451540501656636 has 48 divisors (see below), whose sum is σ = 1204112470668800. Its totient is φ = 129011093375040.

The previous prime is 451540501656619. The next prime is 451540501656641. The reversal of 451540501656636 is 636656105045154.

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, 13128681 + ... + 32793951.

Almost surely, 2^{451540501656636} is an apocalyptic number.

It is an amenable number.

451540501656636 is an abundant number, since it is smaller than the sum of its proper divisors (752571969012164).

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

451540501656636 is a wasteful number, since it uses less digits than its factorization.

451540501656636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19938634 (or 19938632 counting only the distinct ones).

The product of its (nonzero) digits is 38880000, while the sum is 57.

The spelling of 451540501656636 in words is "four hundred fifty-one trillion, five hundred forty billion, five hundred one million, six hundred fifty-six thousand, six hundred thirty-six".