197881557120 has 256 divisors, whose sum is σ = 754741411200. Its totient is φ = 48709251072.

The previous prime is 197881557113. The next prime is 197881557121. The reversal of 197881557120 is 21755188791.

197881557120 is a `hidden beast` number, since 1 + 9 + 7 + 8 + 81 + 557 + 1 + 2 + 0 = 666.

It is a super-2 number, since 2×197881557120² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (197881557121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215802 + ... + 665081.

Almost surely, 2^197881557120 is an apocalyptic number.

197881557120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197881557120 is an abundant number, since it is smaller than the sum of its proper divisors (556859854080).

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

197881557120 is a wasteful number, since it uses less digits than its factorization.

197881557120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880924 (or 880906 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 54.

The spelling of 197881557120 in words is "one hundred ninety-seven billion, eight hundred eighty-one million, five hundred fifty-seven thousand, one hundred twenty".