7976456640 has 112 divisors (see below), whose sum is σ = 28139196960. Its totient is φ = 2127052800.

The previous prime is 7976456629. The next prime is 7976456647. The reversal of 7976456640 is 466546797.

7976456640 is a `hidden beast` number, since 7 + 9 + 76 + 4 + 566 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7976456647) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 452961 + ... + 470240.

It is an arithmetic number, because the mean of its divisors is an integer number (251242830).

Almost surely, 2^7976456640 is an apocalyptic number.

It is an amenable number.

7976456640 is an abundant number, since it is smaller than the sum of its proper divisors (20162740320).

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

7976456640 is a wasteful number, since it uses less digits than its factorization.

7976456640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923227 (or 923211 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The square root of 7976456640 is about 89311.0107433568. The cubic root of 7976456640 is about 1998.0361255631.

The spelling of 7976456640 in words is "seven billion, nine hundred seventy-six million, four hundred fifty-six thousand, six hundred forty".