197451013128 has 64 divisors (see below), whose sum is σ = 497761243200. Its totient is φ = 65267808000.

The previous prime is 197451013117. The next prime is 197451013141. The reversal of 197451013128 is 821310154791.

It is a self number, because there is not a number n which added to its sum of digits gives 197451013128.

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, 1554003 + ... + 1676253.

It is an arithmetic number, because the mean of its divisors is an integer number (7777519425).

Almost surely, 2^197451013128 is an apocalyptic number.

It is an amenable number.

197451013128 is an abundant number, since it is smaller than the sum of its proper divisors (300310230072).

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

197451013128 is a wasteful number, since it uses less digits than its factorization.

197451013128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122822 (or 122818 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 42.

The spelling of 197451013128 in words is "one hundred ninety-seven billion, four hundred fifty-one million, thirteen thousand, one hundred twenty-eight".