164502500261 has 16 divisors (see below), whose sum is σ = 185662584000. Its totient is φ = 144377587200.

The previous prime is 164502500257. The next prime is 164502500291. The reversal of 164502500261 is 162005205461.

It is not a de Polignac number, because 164502500261 - 2² = 164502500257 is a prime.

It is a super-2 number, since 2×164502500261² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164502500231) 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, 5311541 + ... + 5342421.

It is an arithmetic number, because the mean of its divisors is an integer number (11603911500).

Almost surely, 2^164502500261 is an apocalyptic number.

164502500261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

164502500261 is a deficient number, since it is larger than the sum of its proper divisors (21160083739).

164502500261 is a wasteful number, since it uses less digits than its factorization.

164502500261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47620.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 164502500261 in words is "one hundred sixty-four billion, five hundred two million, five hundred thousand, two hundred sixty-one".