420447720722736 has 40 divisors (see below), whose sum is σ = 1241321842134784. Its totient is φ = 120127920206400.

The previous prime is 420447720722719. The next prime is 420447720722789. The reversal of 420447720722736 is 637227027744024.

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, 625666250740 + ... + 625666251411.

Almost surely, 2^{420447720722736} is an apocalyptic number.

It is an amenable number.

420447720722736 is an abundant number, since it is smaller than the sum of its proper divisors (820874121412048).

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

420447720722736 is a wasteful number, since it uses less digits than its factorization.

420447720722736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251332502169 (or 1251332502163 counting only the distinct ones).

The product of its (nonzero) digits is 44255232, while the sum is 57.

The spelling of 420447720722736 in words is "four hundred twenty trillion, four hundred forty-seven billion, seven hundred twenty million, seven hundred twenty-two thousand, seven hundred thirty-six".