7791863040 has 864 divisors, whose sum is σ = 31498661376. Its totient is φ = 1831403520.

The previous prime is 7791862957. The next prime is 7791863063. The reversal of 7791863040 is 403681977.

7791863040 is a `hidden beast` number, since 7 + 7 + 9 + 1 + 8 + 630 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

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 (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 165784297 + ... + 165784343.

It is an arithmetic number, because the mean of its divisors is an integer number (36456784).

Almost surely, 2^7791863040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7791863040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15749330688).

7791863040 is an abundant number, since it is smaller than the sum of its proper divisors (23706798336).

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

7791863040 is a wasteful number, since it uses less digits than its factorization.

7791863040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 7791863040 is about 88271.5301781951. The cubic root of 7791863040 is about 1982.5026206045.

The spelling of 7791863040 in words is "seven billion, seven hundred ninety-one million, eight hundred sixty-three thousand, forty".