189372549465 has 48 divisors (see below), whose sum is σ = 359046642240. Its totient is φ = 91570746240.

The previous prime is 189372549409. The next prime is 189372549493. The reversal of 189372549465 is 564945273981.

189372549465 is a `hidden beast` number, since 1 + 89 + 3 + 7 + 2 + 5 + 494 + 65 = 666.

It is not a de Polignac number, because 189372549465 - 2²⁰ = 189371500889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 328195 + ... + 697464.

It is an arithmetic number, because the mean of its divisors is an integer number (7480138380).

Almost surely, 2^189372549465 is an apocalyptic number.

189372549465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189372549465 is a deficient number, since it is larger than the sum of its proper divisors (169674092775).

189372549465 is a wasteful number, since it uses less digits than its factorization.

189372549465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026054 (or 1026051 counting only the distinct ones).

The product of its digits is 65318400, while the sum is 63.

It can be divided in two parts, 189372 and 549465, that added together give a palindrome (738837).

The spelling of 189372549465 in words is "one hundred eighty-nine billion, three hundred seventy-two million, five hundred forty-nine thousand, four hundred sixty-five".