31645605051 has 24 divisors (see below), whose sum is σ = 47006846640. Its totient is φ = 20500157376.

The previous prime is 31645605049. The next prime is 31645605067. The reversal of 31645605051 is 15050654613.

31645605051 is a `hidden beast` number, since 3 + 1 + 6 + 45 + 605 + 0 + 5 + 1 = 666.

It is not a de Polignac number, because 31645605051 - 2¹ = 31645605049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31645604997 and 31645605015.

It is not an unprimeable number, because it can be changed into a prime (31645605001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195940 + ... + 318878.

It is an arithmetic number, because the mean of its divisors is an integer number (1958618610).

Almost surely, 2^31645605051 is an apocalyptic number.

31645605051 is a deficient number, since it is larger than the sum of its proper divisors (15361241589).

31645605051 is a wasteful number, since it uses less digits than its factorization.

31645605051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123755 (or 123752 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 31645605051 in words is "thirty-one billion, six hundred forty-five million, six hundred five thousand, fifty-one".