397636181056 has 21 divisors (see below), whose sum is σ = 789069307431. Its totient is φ = 198815568192.

The previous prime is 397636181017. The next prime is 397636181069. The reversal of 397636181056 is 650181636793.

The square root of 397636181056 is 630584.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×397636181056² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397636180988 and 397636181006.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5005261 + ... + 5084083.

Almost surely, 2^397636181056 is an apocalyptic number.

397636181056 is the 630584-th square number.

It is an amenable number.

397636181056 is a deficient number, since it is larger than the sum of its proper divisors (391433126375).

397636181056 is an frugal number, since it uses more digits than its factorization.

397636181056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157658 (or 78825 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 397636181056 in words is "three hundred ninety-seven billion, six hundred thirty-six million, one hundred eighty-one thousand, fifty-six".