7687731057 has 8 divisors (see below), whose sum is σ = 10250870784. Its totient is φ = 5124872688.

The previous prime is 7687731031. The next prime is 7687731067. The reversal of 7687731057 is 7501377867.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7687731057 - 2⁸ = 7687730801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7687731067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4923 + ... + 124095.

It is an arithmetic number, because the mean of its divisors is an integer number (1281358848).

Almost surely, 2^7687731057 is an apocalyptic number.

It is an amenable number.

7687731057 is a deficient number, since it is larger than the sum of its proper divisors (2563139727).

7687731057 is a wasteful number, since it uses less digits than its factorization.

7687731057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140679.

The product of its (nonzero) digits is 1728720, while the sum is 51.

The square root of 7687731057 is about 87679.7072132429. The cubic root of 7687731057 is about 1973.6314661300.

The spelling of 7687731057 in words is "seven billion, six hundred eighty-seven million, seven hundred thirty-one thousand, fifty-seven".