997235569656215 has 16 divisors (see below), whose sum is σ = 1259741283074400. Its totient is φ = 755754409423872.

The previous prime is 997235569656187. The next prime is 997235569656241. The reversal of 997235569656215 is 512656965532799.

It is a cyclic number.

It is not a de Polignac number, because 997235569656215 - 2²⁸ = 997235301220759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 997235569656215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312153842 + ... + 315332351.

It is an arithmetic number, because the mean of its divisors is an integer number (78733830192150).

Almost surely, 2^{997235569656215} is an apocalyptic number.

997235569656215 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

997235569656215 is a deficient number, since it is larger than the sum of its proper divisors (262505713418185).

997235569656215 is a wasteful number, since it uses less digits than its factorization.

997235569656215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627502946.

The product of its digits is 8266860000, while the sum is 80.

The spelling of 997235569656215 in words is "nine hundred ninety-seven trillion, two hundred thirty-five billion, five hundred sixty-nine million, six hundred fifty-six thousand, two hundred fifteen".