421138516992 has 176 divisors, whose sum is σ = 1172260108032. Its totient is φ = 134165053440.

The previous prime is 421138516979. The next prime is 421138517011. The reversal of 421138516992 is 299615831124.

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, 150566538 + ... + 150569334.

Almost surely, 2^421138516992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421138516992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (586130054016).

421138516992 is an abundant number, since it is smaller than the sum of its proper divisors (751121591040).

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

421138516992 is a wasteful number, since it uses less digits than its factorization.

421138516992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4974 (or 4956 counting only the distinct ones).

The product of its digits is 933120, while the sum is 51.

The spelling of 421138516992 in words is "four hundred twenty-one billion, one hundred thirty-eight million, five hundred sixteen thousand, nine hundred ninety-two".