164365136252251 has 32 divisors (see below), whose sum is σ = 198115151961600. Its totient is φ = 134514929134080.

The previous prime is 164365136252249. The next prime is 164365136252309. The reversal of 164365136252251 is 152252631563461.

It is not a de Polignac number, because 164365136252251 - 2¹ = 164365136252249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164365136252201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154775640 + ... + 155833978.

It is an arithmetic number, because the mean of its divisors is an integer number (6191098498800).

Almost surely, 2^{164365136252251} is an apocalyptic number.

164365136252251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

164365136252251 is a deficient number, since it is larger than the sum of its proper divisors (33750015709349).

164365136252251 is a wasteful number, since it uses less digits than its factorization.

164365136252251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094499.

The product of its digits is 7776000, while the sum is 52.

The spelling of 164365136252251 in words is "one hundred sixty-four trillion, three hundred sixty-five billion, one hundred thirty-six million, two hundred fifty-two thousand, two hundred fifty-one".