7964689685 has 8 divisors (see below), whose sum is σ = 9578544216. Its totient is φ = 6357807360.

The previous prime is 7964689661. The next prime is 7964689687. The reversal of 7964689685 is 5869864697.

It can be written as a sum of positive squares in 4 ways, for example, as 1657629796 + 6307059889 = 40714^2 + 79417^2 .

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

It is not a de Polignac number, because 7964689685 - 2³² = 3669722389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7964689687) 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, 1740536 + ... + 1745105.

It is an arithmetic number, because the mean of its divisors is an integer number (1197318027).

Almost surely, 2^7964689685 is an apocalyptic number.

It is an amenable number.

7964689685 is a deficient number, since it is larger than the sum of its proper divisors (1613854531).

7964689685 is a wasteful number, since it uses less digits than its factorization.

7964689685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3486103.

The product of its digits is 156764160, while the sum is 68.

The square root of 7964689685 is about 89245.1101461587. The cubic root of 7964689685 is about 1997.0531338726.

The spelling of 7964689685 in words is "seven billion, nine hundred sixty-four million, six hundred eighty-nine thousand, six hundred eighty-five".