189797790456 has 48 divisors (see below), whose sum is σ = 514411981200. Its totient is φ = 63219616512.

The previous prime is 189797790449. The next prime is 189797790463. The reversal of 189797790456 is 654097797981.

189797790456 is a `hidden beast` number, since 1 + 89 + 7 + 9 + 7 + 7 + 90 + 456 = 666.

It is an interprime number because it is at equal distance from previous prime (189797790449) and next prime (189797790463).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 865761 + ... + 1062608.

It is an arithmetic number, because the mean of its divisors is an integer number (10716916275).

Almost surely, 2^189797790456 is an apocalyptic number.

It is an amenable number.

189797790456 is an abundant number, since it is smaller than the sum of its proper divisors (324614190744).

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

189797790456 is a wasteful number, since it uses less digits than its factorization.

189797790456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929748 (or 1929741 counting only the distinct ones).

The product of its (nonzero) digits is 240045120, while the sum is 72.

The spelling of 189797790456 in words is "one hundred eighty-nine billion, seven hundred ninety-seven million, seven hundred ninety thousand, four hundred fifty-six".