421771439556 has 48 divisors (see below), whose sum is σ = 1093522118080. Its totient is φ = 140585258880.

The previous prime is 421771439519. The next prime is 421771439627. The reversal of 421771439556 is 655934177124.

421771439556 is a `hidden beast` number, since 4 + 2 + 1 + 77 + 14 + 3 + 9 + 556 = 666.

It is a super-2 number, since 2×421771439556² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3804300 + ... + 3913596.

Almost surely, 2^421771439556 is an apocalyptic number.

It is an amenable number.

421771439556 is an abundant number, since it is smaller than the sum of its proper divisors (671750678524).

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

421771439556 is a wasteful number, since it uses less digits than its factorization.

421771439556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145041 (or 145033 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 54.

The spelling of 421771439556 in words is "four hundred twenty-one billion, seven hundred seventy-one million, four hundred thirty-nine thousand, five hundred fifty-six".