189734072136 has 64 divisors (see below), whose sum is σ = 555319255680. Its totient is φ = 52887544320.

The previous prime is 189734072131. The next prime is 189734072137. The reversal of 189734072136 is 631270437981.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (189734072131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13765911 + ... + 13779686.

It is an arithmetic number, because the mean of its divisors is an integer number (8676863370).

Almost surely, 2^189734072136 is an apocalyptic number.

It is an amenable number.

189734072136 is an abundant number, since it is smaller than the sum of its proper divisors (365585183544).

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

189734072136 is a wasteful number, since it uses less digits than its factorization.

189734072136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27545654 (or 27545650 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 51.

The spelling of 189734072136 in words is "one hundred eighty-nine billion, seven hundred thirty-four million, seventy-two thousand, one hundred thirty-six".