420964815717 has 32 divisors (see below), whose sum is σ = 639485436800. Its totient is φ = 273604345344.

The previous prime is 420964815707. The next prime is 420964815721. The reversal of 420964815717 is 717518469024.

420964815717 is a `hidden beast` number, since 4 + 2 + 0 + 9 + 64 + 8 + 1 + 571 + 7 = 666.

It is not a de Polignac number, because 420964815717 - 2¹² = 420964811621 is a prime.

It is a super-2 number, since 2×420964815717² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420964815707) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1024042 + ... + 1374987.

It is an arithmetic number, because the mean of its divisors is an integer number (19983919900).

Almost surely, 2^420964815717 is an apocalyptic number.

It is an amenable number.

420964815717 is a deficient number, since it is larger than the sum of its proper divisors (218520621083).

420964815717 is a wasteful number, since it uses less digits than its factorization.

420964815717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2399202 (or 2399196 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 420964815717 in words is "four hundred twenty billion, nine hundred sixty-four million, eight hundred fifteen thousand, seven hundred seventeen".