31647628485 has 72 divisors (see below), whose sum is σ = 63570308256. Its totient is φ = 14441633280.

The previous prime is 31647628477. The next prime is 31647628489. The reversal of 31647628485 is 58482674613.

It is a happy number.

31647628485 is a `hidden beast` number, since 3 + 1 + 6 + 4 + 7 + 628 + 4 + 8 + 5 = 666.

It is not a de Polignac number, because 31647628485 - 2³ = 31647628477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31647628489) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 32442 + ... + 253668.

It is an arithmetic number, because the mean of its divisors is an integer number (882920948).

Almost surely, 2^31647628485 is an apocalyptic number.

It is an amenable number.

31647628485 is an abundant number, since it is smaller than the sum of its proper divisors (31922679771).

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

31647628485 is a wasteful number, since it uses less digits than its factorization.

31647628485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221283 (or 221263 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 54.

The spelling of 31647628485 in words is "thirty-one billion, six hundred forty-seven million, six hundred twenty-eight thousand, four hundred eighty-five".