15698997907 has 6 divisors (see below), whose sum is σ = 15752337524. Its totient is φ = 15645672900.

The previous prime is 15698997889. The next prime is 15698997911. The reversal of 15698997907 is 70979989651.

It is a de Polignac number, because none of the positive numbers 2^k-15698997907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15698997997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2191782 + ... + 2198932.

Almost surely, 2^15698997907 is an apocalyptic number.

15698997907 is a deficient number, since it is larger than the sum of its proper divisors (53339617).

15698997907 is an frugal number, since it uses more digits than its factorization.

15698997907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14609 (or 7458 counting only the distinct ones).

The product of its (nonzero) digits is 77157360, while the sum is 70.

The spelling of 15698997907 in words is "fifteen billion, six hundred ninety-eight million, nine hundred ninety-seven thousand, nine hundred seven".