145564556631 has 16 divisors (see below), whose sum is σ = 209023624320. Its totient is φ = 89574824160.

The previous prime is 145564556611. The next prime is 145564556639. The reversal of 145564556631 is 136655465541.

It is not a de Polignac number, because 145564556631 - 2¹⁰ = 145564555607 is a prime.

It is a super-2 number, since 2×145564556631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145564556639) 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, 1341280 + ... + 1445738.

It is an arithmetic number, because the mean of its divisors is an integer number (13063976520).

Almost surely, 2^145564556631 is an apocalyptic number.

145564556631 is a deficient number, since it is larger than the sum of its proper divisors (63459067689).

145564556631 is a wasteful number, since it uses less digits than its factorization.

145564556631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140206.

The product of its digits is 6480000, while the sum is 51.

The spelling of 145564556631 in words is "one hundred forty-five billion, five hundred sixty-four million, five hundred fifty-six thousand, six hundred thirty-one".