7930516521 has 8 divisors (see below), whose sum is σ = 10579155840. Its totient is φ = 5284444112.

The previous prime is 7930516519. The next prime is 7930516543. The reversal of 7930516521 is 1256150397.

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 7930516521 - 2¹ = 7930516519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7930516521.

It is not an unprimeable number, because it can be changed into a prime (7930514521) 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, 634506 + ... + 646883.

It is an arithmetic number, because the mean of its divisors is an integer number (1322394480).

Almost surely, 2^7930516521 is an apocalyptic number.

It is an amenable number.

7930516521 is a deficient number, since it is larger than the sum of its proper divisors (2648639319).

7930516521 is a wasteful number, since it uses less digits than its factorization.

7930516521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283455.

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 7930516521 is about 89053.4475525793. The cubic root of 7930516521 is about 1994.1928649943.

The spelling of 7930516521 in words is "seven billion, nine hundred thirty million, five hundred sixteen thousand, five hundred twenty-one".