421499157920 has 24 divisors (see below), whose sum is σ = 995791760964. Its totient is φ = 168599663104.

The previous prime is 421499157907. The next prime is 421499157923. The reversal of 421499157920 is 29751994124.

It can be written as a sum of positive squares in 2 ways, for example, as 418665937936 + 2833219984 = 647044^2 + 53228^2 .

It is not an unprimeable number, because it can be changed into a prime (421499157923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1317184709 + ... + 1317185028.

Almost surely, 2^421499157920 is an apocalyptic number.

421499157920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421499157920 is an abundant number, since it is smaller than the sum of its proper divisors (574292603044).

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

421499157920 is a wasteful number, since it uses less digits than its factorization.

421499157920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634369752 (or 2634369744 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 421499157920 in words is "four hundred twenty-one billion, four hundred ninety-nine million, one hundred fifty-seven thousand, nine hundred twenty".