189950723136 has 280 divisors, whose sum is σ = 579648157440. Its totient is φ = 61461255168.

The previous prime is 189950723119. The next prime is 189950723143. The reversal of 189950723136 is 631327059981.

189950723136 is a `hidden beast` number, since 1 + 89 + 9 + 507 + 23 + 1 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 107987025 + ... + 107988783.

Almost surely, 2^189950723136 is an apocalyptic number.

189950723136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189950723136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289824078720).

189950723136 is an abundant number, since it is smaller than the sum of its proper divisors (389697434304).

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

189950723136 is a wasteful number, since it uses less digits than its factorization.

189950723136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383 (or 2364 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The spelling of 189950723136 in words is "one hundred eighty-nine billion, nine hundred fifty million, seven hundred twenty-three thousand, one hundred thirty-six".