15947397964 has 6 divisors (see below), whose sum is σ = 27907946444. Its totient is φ = 7973698980.

The previous prime is 15947397923. The next prime is 15947397971. The reversal of 15947397964 is 46979374951.

It is a junction number, because it is equal to n+sod(n) for n = 15947397896 and 15947397905.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1993424742 + ... + 1993424749.

Almost surely, 2^15947397964 is an apocalyptic number.

It is an amenable number.

15947397964 is a deficient number, since it is larger than the sum of its proper divisors (11960548480).

15947397964 is a wasteful number, since it uses less digits than its factorization.

15947397964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3986849495 (or 3986849493 counting only the distinct ones).

The product of its digits is 51438240, while the sum is 64.

The spelling of 15947397964 in words is "fifteen billion, nine hundred forty-seven million, three hundred ninety-seven thousand, nine hundred sixty-four".