697890921578816 has 28 divisors (see below), whose sum is σ = 1582716911438688. Its totient is φ = 299096109247872.

The previous prime is 697890921578803. The next prime is 697890921578827. The reversal of 697890921578816 is 618875129098796.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778896117386 + ... + 778896118281.

Almost surely, 2^{697890921578816} is an apocalyptic number.

It is an amenable number.

697890921578816 is an abundant number, since it is smaller than the sum of its proper divisors (884825989859872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

697890921578816 is a wasteful number, since it uses less digits than its factorization.

697890921578816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557792235686 (or 1557792235676 counting only the distinct ones).

The product of its (nonzero) digits is 6584094720, while the sum is 86.

The spelling of 697890921578816 in words is "six hundred ninety-seven trillion, eight hundred ninety billion, nine hundred twenty-one million, five hundred seventy-eight thousand, eight hundred sixteen".