189531266400 has 216 divisors, whose sum is σ = 763811206704. Its totient is φ = 43321420800.

The previous prime is 189531266377. The next prime is 189531266413. The reversal of 189531266400 is 4662135981.

189531266400 is a `hidden beast` number, since 18 + 9 + 531 + 2 + 66 + 40 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1829871 + ... + 1930670.

It is an arithmetic number, because the mean of its divisors is an integer number (3536162994).

Almost surely, 2^189531266400 is an apocalyptic number.

189531266400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189531266400 is an abundant number, since it is smaller than the sum of its proper divisors (574279940304).

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

189531266400 is a wasteful number, since it uses less digits than its factorization.

189531266400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3760574 (or 3760558 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 189531266400 in words is "one hundred eighty-nine billion, five hundred thirty-one million, two hundred sixty-six thousand, four hundred".