20150660326465 has 16 divisors (see below), whose sum is σ = 25015591040400. Its totient is φ = 15564039305472.

The previous prime is 20150660326457. The next prime is 20150660326469. The reversal of 20150660326465 is 56462306605102.

It can be written as a sum of positive squares in 8 ways, for example, as 209353832704 + 19941306493761 = 457552^2 + 4465569^2 .

It is a cyclic number.

It is not a de Polignac number, because 20150660326465 - 2³ = 20150660326457 is a prime.

It is a super-2 number, since 2×20150660326465² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20150660326469) 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, 1021051 + ... + 6429919.

It is an arithmetic number, because the mean of its divisors is an integer number (1563474440025).

Almost surely, 2^{20150660326465} is an apocalyptic number.

It is an amenable number.

20150660326465 is a deficient number, since it is larger than the sum of its proper divisors (4864930713935).

20150660326465 is a wasteful number, since it uses less digits than its factorization.

20150660326465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5434596.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 20150660326465 in words is "twenty trillion, one hundred fifty billion, six hundred sixty million, three hundred twenty-six thousand, four hundred sixty-five".