421333379172 has 18 divisors (see below), whose sum is σ = 1065037152998. Its totient is φ = 140444459712.

The previous prime is 421333379161. The next prime is 421333379213. The reversal of 421333379172 is 271973333124.

It can be written as a sum of positive squares in only one way, i.e., 347552695296 + 73780683876 = 589536^2 + 271626^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5851852453 + ... + 5851852524.

Almost surely, 2^421333379172 is an apocalyptic number.

It is an amenable number.

421333379172 is an abundant number, since it is smaller than the sum of its proper divisors (643703773826).

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

421333379172 is a wasteful number, since it uses less digits than its factorization.

421333379172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11703704987 (or 11703704982 counting only the distinct ones).

The product of its digits is 571536, while the sum is 45.

The spelling of 421333379172 in words is "four hundred twenty-one billion, three hundred thirty-three million, three hundred seventy-nine thousand, one hundred seventy-two".