445165505631 has 96 divisors (see below), whose sum is σ = 844434739200. Its totient is φ = 223794446400.

The previous prime is 445165505549. The next prime is 445165505657. The reversal of 445165505631 is 136505561544.

445165505631 is a `hidden beast` number, since 4 + 4 + 5 + 1 + 6 + 5 + 5 + 0 + 5 + 631 = 666.

It is not a de Polignac number, because 445165505631 - 2⁹ = 445165505119 is a prime.

It is a super-2 number, since 2×445165505631² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445165505231) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 841221 + ... + 1264113.

It is an arithmetic number, because the mean of its divisors is an integer number (8796195200).

Almost surely, 2^445165505631 is an apocalyptic number.

445165505631 is a deficient number, since it is larger than the sum of its proper divisors (399269233569).

445165505631 is a wasteful number, since it uses less digits than its factorization.

445165505631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422962 (or 422945 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The spelling of 445165505631 in words is "four hundred forty-five billion, one hundred sixty-five million, five hundred five thousand, six hundred thirty-one".