189790864496 has 20 divisors (see below), whose sum is σ = 367778151912. Its totient is φ = 94880373696.

The previous prime is 189790864493. The next prime is 189790864519. The reversal of 189790864496 is 694468097981.

It is a super-2 number, since 2×189790864496² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189790864493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836831 + ... + 1039166.

Almost surely, 2^189790864496 is an apocalyptic number.

189790864496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

189790864496 is a deficient number, since it is larger than the sum of its proper divisors (177987287416).

189790864496 is a wasteful number, since it uses less digits than its factorization.

189790864496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1882328 (or 1882322 counting only the distinct ones).

The product of its (nonzero) digits is 188116992, while the sum is 71.

The spelling of 189790864496 in words is "one hundred eighty-nine billion, seven hundred ninety million, eight hundred sixty-four thousand, four hundred ninety-six".