165626313423640 has 64 divisors (see below), whose sum is σ = 373553677941120. Its totient is φ = 66091515840000.

The previous prime is 165626313423563. The next prime is 165626313423647. The reversal of 165626313423640 is 46324313626561.

It is a super-2 number, since 2×165626313423640² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165626313423647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 853202590 + ... + 853396690.

It is an arithmetic number, because the mean of its divisors is an integer number (5836776217830).

Almost surely, 2^{165626313423640} is an apocalyptic number.

165626313423640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165626313423640 is an abundant number, since it is smaller than the sum of its proper divisors (207927364517480).

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

165626313423640 is a wasteful number, since it uses less digits than its factorization.

165626313423640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245204 (or 245200 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 52.

The spelling of 165626313423640 in words is "one hundred sixty-five trillion, six hundred twenty-six billion, three hundred thirteen million, four hundred twenty-three thousand, six hundred forty".