645651632046 has 16 divisors (see below), whose sum is σ = 1293022718208. Its totient is φ = 214930635000.

The previous prime is 645651632011. The next prime is 645651632069. The reversal of 645651632046 is 640236156546.

It is a super-2 number, since 2×645651632046² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645651631986 and 645651632004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71639040 + ... + 71648051.

It is an arithmetic number, because the mean of its divisors is an integer number (80813919888).

Almost surely, 2^645651632046 is an apocalyptic number.

645651632046 is an abundant number, since it is smaller than the sum of its proper divisors (647371086162).

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

645651632046 is a wasteful number, since it uses less digits than its factorization.

645651632046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143287847.

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 645651632046 in words is "six hundred forty-five billion, six hundred fifty-one million, six hundred thirty-two thousand, forty-six".