187993172364 has 48 divisors (see below), whose sum is σ = 447150503520. Its totient is φ = 61451320320.

The previous prime is 187993172333. The next prime is 187993172399. The reversal of 187993172364 is 463271399781.

It is a super-2 number, since 2×187993172364² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 187993172298 and 187993172307.

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, 1217604 + ... + 1363284.

It is an arithmetic number, because the mean of its divisors is an integer number (9315635490).

Almost surely, 2^187993172364 is an apocalyptic number.

It is an amenable number.

187993172364 is an abundant number, since it is smaller than the sum of its proper divisors (259157331156).

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

187993172364 is a wasteful number, since it uses less digits than its factorization.

187993172364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147770 (or 147768 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 60.

The spelling of 187993172364 in words is "one hundred eighty-seven billion, nine hundred ninety-three million, one hundred seventy-two thousand, three hundred sixty-four".