15920766897 has 16 divisors (see below), whose sum is σ = 24271104000. Its totient is φ = 9093498192.

The previous prime is 15920766871. The next prime is 15920766907. The reversal of 15920766897 is 79866702951.

It is not a de Polignac number, because 15920766897 - 2¹² = 15920762801 is a prime.

It is a super-2 number, since 2×15920766897² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15920766897.

It is not an unprimeable number, because it can be changed into a prime (15920766397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121897 + ... + 216102.

It is an arithmetic number, because the mean of its divisors is an integer number (1516944000).

Almost surely, 2^15920766897 is an apocalyptic number.

It is an amenable number.

15920766897 is a deficient number, since it is larger than the sum of its proper divisors (8350337103).

15920766897 is a wasteful number, since it uses less digits than its factorization.

15920766897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340252.

The product of its (nonzero) digits is 11430720, while the sum is 60.

The spelling of 15920766897 in words is "fifteen billion, nine hundred twenty million, seven hundred sixty-six thousand, eight hundred ninety-seven".