197715857456 has 40 divisors (see below), whose sum is σ = 412600091904. Its totient is φ = 91240565760.

The previous prime is 197715857429. The next prime is 197715857491. The reversal of 197715857456 is 654758517791.

It is a super-2 number, since 2×197715857456² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 197715857392 and 197715857401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1493816 + ... + 1620776.

Almost surely, 2^197715857456 is an apocalyptic number.

197715857456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

197715857456 is an abundant number, since it is smaller than the sum of its proper divisors (214884234448).

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

197715857456 is a wasteful number, since it uses less digits than its factorization.

197715857456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134469 (or 134463 counting only the distinct ones).

The product of its digits is 74088000, while the sum is 65.

The spelling of 197715857456 in words is "one hundred ninety-seven billion, seven hundred fifteen million, eight hundred fifty-seven thousand, four hundred fifty-six".