7915313681 has 8 divisors (see below), whose sum is σ = 8781242400. Its totient is φ = 7073777440.

The previous prime is 7915313677. The next prime is 7915313687. The reversal of 7915313681 is 1863135197.

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

It is a cyclic number.

It is not a de Polignac number, because 7915313681 - 2² = 7915313677 is a prime.

It is a super-2 number, since 2×7915313681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7915313687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6097436 + ... + 6098733.

It is an arithmetic number, because the mean of its divisors is an integer number (1097655300).

Almost surely, 2^7915313681 is an apocalyptic number.

It is an amenable number.

7915313681 is a deficient number, since it is larger than the sum of its proper divisors (865928719).

7915313681 is a wasteful number, since it uses less digits than its factorization.

7915313681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12196239.

The product of its digits is 136080, while the sum is 44.

The square root of 7915313681 is about 88968.0486523111. The cubic root of 7915313681 is about 1992.9177572717.

The spelling of 7915313681 in words is "seven billion, nine hundred fifteen million, three hundred thirteen thousand, six hundred eighty-one".