197392865664 has 32 divisors (see below), whose sum is σ = 524324800440. Its totient is φ = 65797621760.

The previous prime is 197392865653. The next prime is 197392865687. The reversal of 197392865664 is 466568293791.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 197392865595 and 197392865604.

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, 257021577 + ... + 257022344.

Almost surely, 2^197392865664 is an apocalyptic number.

It is an amenable number.

197392865664 is an abundant number, since it is smaller than the sum of its proper divisors (326931934776).

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

197392865664 is an equidigital number, since it uses as much as digits as its factorization.

197392865664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514043938 (or 514043926 counting only the distinct ones).

The product of its digits is 117573120, while the sum is 66.

The spelling of 197392865664 in words is "one hundred ninety-seven billion, three hundred ninety-two million, eight hundred sixty-five thousand, six hundred sixty-four".