31634919945 has 24 divisors (see below), whose sum is σ = 55732781832. Its totient is φ = 16595366400.

The previous prime is 31634919871. The next prime is 31634919947. The reversal of 31634919945 is 54991943613.

It is a happy number.

31634919945 is a `hidden beast` number, since 3 + 1 + 63 + 491 + 9 + 94 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1776116736 + 29858803209 = 42144^2 + 172797^2 .

It is not a de Polignac number, because 31634919945 - 2¹³ = 31634911753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31634919891 and 31634919900.

It is not an unprimeable number, because it can be changed into a prime (31634919947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5759536 + ... + 5765025.

It is an arithmetic number, because the mean of its divisors is an integer number (2322199243).

Almost surely, 2^31634919945 is an apocalyptic number.

It is an amenable number.

31634919945 is a deficient number, since it is larger than the sum of its proper divisors (24097861887).

31634919945 is a wasteful number, since it uses less digits than its factorization.

31634919945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11524633 (or 11524630 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The spelling of 31634919945 in words is "thirty-one billion, six hundred thirty-four million, nine hundred nineteen thousand, nine hundred forty-five".