645635242460 has 48 divisors (see below), whose sum is σ = 1464461858496. Its totient is φ = 237680980992.

The previous prime is 645635242457. The next prime is 645635242481. The reversal of 645635242460 is 64242536546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3596672 + ... + 3771911.

It is an arithmetic number, because the mean of its divisors is an integer number (30509622052).

Almost surely, 2^645635242460 is an apocalyptic number.

It is an amenable number.

645635242460 is an abundant number, since it is smaller than the sum of its proper divisors (818826616036).

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

645635242460 is a wasteful number, since it uses less digits than its factorization.

645635242460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7368942 (or 7368940 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 47.

The spelling of 645635242460 in words is "six hundred forty-five billion, six hundred thirty-five million, two hundred forty-two thousand, four hundred sixty".