421356657917 has 32 divisors (see below), whose sum is σ = 461963174400. Its totient is φ = 381991599360.

The previous prime is 421356657881. The next prime is 421356657929. The reversal of 421356657917 is 719756653124.

It is a cyclic number.

It is not a de Polignac number, because 421356657917 - 2¹⁰ = 421356656893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421356657217) 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, 176965067 + ... + 176967447.

It is an arithmetic number, because the mean of its divisors is an integer number (14436349200).

Almost surely, 2^421356657917 is an apocalyptic number.

It is an amenable number.

421356657917 is a deficient number, since it is larger than the sum of its proper divisors (40606516483).

421356657917 is a wasteful number, since it uses less digits than its factorization.

421356657917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3533.

The product of its digits is 9525600, while the sum is 56.

The spelling of 421356657917 in words is "four hundred twenty-one billion, three hundred fifty-six million, six hundred fifty-seven thousand, nine hundred seventeen".