421378915293 has 72 divisors (see below), whose sum is σ = 739015495296. Its totient is φ = 226602360000.

The previous prime is 421378915249. The next prime is 421378915301. The reversal of 421378915293 is 392519873124.

421378915293 is a `hidden beast` number, since 4 + 2 + 1 + 37 + 89 + 1 + 529 + 3 = 666.

It is not a de Polignac number, because 421378915293 - 2¹² = 421378911197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421378915693) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3372843 + ... + 3495543.

Almost surely, 2^421378915293 is an apocalyptic number.

It is an amenable number.

421378915293 is a deficient number, since it is larger than the sum of its proper divisors (317636580003).

421378915293 is a wasteful number, since it uses less digits than its factorization.

421378915293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122903 (or 122881 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The spelling of 421378915293 in words is "four hundred twenty-one billion, three hundred seventy-eight million, nine hundred fifteen thousand, two hundred ninety-three".