421437793816 has 32 divisors (see below), whose sum is σ = 855389424960. Its totient is φ = 193501919232.

The previous prime is 421437793813. The next prime is 421437793831. The reversal of 421437793816 is 618397734124.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421437793813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10478080 + ... + 10518223.

It is an arithmetic number, because the mean of its divisors is an integer number (26730919530).

Almost surely, 2^421437793816 is an apocalyptic number.

It is an amenable number.

421437793816 is an abundant number, since it is smaller than the sum of its proper divisors (433951631144).

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

421437793816 is a wasteful number, since it uses less digits than its factorization.

421437793816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20996515 (or 20996511 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 55.

The spelling of 421437793816 in words is "four hundred twenty-one billion, four hundred thirty-seven million, seven hundred ninety-three thousand, eight hundred sixteen".