164973696397520 has 80 divisors (see below), whose sum is σ = 394168415838912. Its totient is φ = 64178208998400.

The previous prime is 164973696397373. The next prime is 164973696397681. The reversal of 164973696397520 is 25793696379461.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×164973696397520² (a number of 29 digits) contains 22 as substring.

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, 102111506 + ... + 103714545.

Almost surely, 2^{164973696397520} is an apocalyptic number.

164973696397520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164973696397520 is an abundant number, since it is smaller than the sum of its proper divisors (229194719441392).

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

164973696397520 is a wasteful number, since it uses less digits than its factorization.

164973696397520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205826340 (or 205826334 counting only the distinct ones).

The product of its (nonzero) digits is 2777664960, while the sum is 77.

The spelling of 164973696397520 in words is "one hundred sixty-four trillion, nine hundred seventy-three billion, six hundred ninety-six million, three hundred ninety-seven thousand, five hundred twenty".