15691069696 has 27 divisors (see below), whose sum is σ = 31324847281. Its totient is φ = 7844532736.

The previous prime is 15691069657. The next prime is 15691069783. The reversal of 15691069696 is 69696019651.

The square root of 15691069696 is 125264.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2048829696 + 13642240000 = 45264^2 + 116800^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15691069696.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2000310 + ... + 2008138.

Almost surely, 2^15691069696 is an apocalyptic number.

15691069696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

15691069696 is the 125264-th square number.

It is an amenable number.

15691069696 is a deficient number, since it is larger than the sum of its proper divisors (15633777585).

15691069696 is an frugal number, since it uses more digits than its factorization.

15691069696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15674 (or 7831 counting only the distinct ones).

The product of its (nonzero) digits is 4723920, while the sum is 58.

The spelling of 15691069696 in words is "fifteen billion, six hundred ninety-one million, sixty-nine thousand, six hundred ninety-six".