420618661264 has 40 divisors (see below), whose sum is σ = 862979160888. Its totient is φ = 197917009920.

The previous prime is 420618661259. The next prime is 420618661297. The reversal of 420618661264 is 462166816024.

It can be written as a sum of positive squares in 4 ways, for example, as 46955422864 + 373663238400 = 216692^2 + 611280^2 .

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, 2626174 + ... + 2781730.

Almost surely, 2^420618661264 is an apocalyptic number.

It is an amenable number.

420618661264 is an abundant number, since it is smaller than the sum of its proper divisors (442360499624).

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

420618661264 is a wasteful number, since it uses less digits than its factorization.

420618661264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165523 (or 165517 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 46.

The spelling of 420618661264 in words is "four hundred twenty billion, six hundred eighteen million, six hundred sixty-one thousand, two hundred sixty-four".