15455807640 has 1280 divisors, whose sum is σ = 70253568000. Its totient is φ = 2956124160.

The previous prime is 15455807629. The next prime is 15455807657. The reversal of 15455807640 is 4670855451.

15455807640 is a `hidden beast` number, since 1 + 5 + 4 + 5 + 580 + 7 + 64 + 0 = 666.

15455807640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 173660716 + ... + 173660804.

It is an arithmetic number, because the mean of its divisors is an integer number (54885600).

Almost surely, 2^15455807640 is an apocalyptic number.

15455807640 is a gapful number since it is divisible by the number (10) 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 15455807640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35126784000).

15455807640 is an abundant number, since it is smaller than the sum of its proper divisors (54797760360).

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

15455807640 is a wasteful number, since it uses less digits than its factorization.

15455807640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 45.

The spelling of 15455807640 in words is "fifteen billion, four hundred fifty-five million, eight hundred seven thousand, six hundred forty".