189278744975 has 48 divisors (see below), whose sum is σ = 247768204320. Its totient is φ = 143217984000.

The previous prime is 189278744929. The next prime is 189278745001. The reversal of 189278744975 is 579447872981.

It is not a de Polignac number, because 189278744975 - 2²² = 189274550671 is a prime.

It is a super-2 number, since 2×189278744975² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 189278744899 and 189278744908.

It is a congruent number.

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, 26932412 + ... + 26939438.

It is an arithmetic number, because the mean of its divisors is an integer number (5161837590).

Almost surely, 2^189278744975 is an apocalyptic number.

189278744975 is a deficient number, since it is larger than the sum of its proper divisors (58489459345).

189278744975 is a wasteful number, since it uses less digits than its factorization.

189278744975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7820 (or 7815 counting only the distinct ones).

The product of its digits is 284497920, while the sum is 71.

The spelling of 189278744975 in words is "one hundred eighty-nine billion, two hundred seventy-eight million, seven hundred forty-four thousand, nine hundred seventy-five".