8151704640 has 168 divisors, whose sum is σ = 28202263128. Its totient is φ = 2161090560.

The previous prime is 8151704599. The next prime is 8151704641. The reversal of 8151704640 is 464071518.

It is a happy number.

8151704640 is a `hidden beast` number, since 8 + 1 + 5 + 1 + 7 + 0 + 4 + 640 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1882865664 + 6268838976 = 43392^2 + 79176^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 8151704595 and 8151704604.

It is not an unprimeable number, because it can be changed into a prime (8151704641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 490060 + ... + 506420.

Almost surely, 2^8151704640 is an apocalyptic number.

8151704640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8151704640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14101131564).

8151704640 is an abundant number, since it is smaller than the sum of its proper divisors (20050558488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8151704640 is a wasteful number, since it uses less digits than its factorization.

8151704640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16557 (or 16544 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 8151704640 is about 90286.7910604868. The cubic root of 8151704640 is about 2012.5629739434.

The spelling of 8151704640 in words is "eight billion, one hundred fifty-one million, seven hundred four thousand, six hundred forty".