493965902421 has 16 divisors (see below), whose sum is σ = 734863276800. Its totient is φ = 327932728704.

The previous prime is 493965902407. The next prime is 493965902471. The reversal of 493965902421 is 124209569394.

493965902421 is a `hidden beast` number, since 4 + 9 + 3 + 9 + 6 + 590 + 2 + 42 + 1 = 666.

It is not a de Polignac number, because 493965902421 - 2¹⁰ = 493965901397 is a prime.

It is a super-2 number, since 2×493965902421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493965902471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38267676 + ... + 38280581.

It is an arithmetic number, because the mean of its divisors is an integer number (45928954800).

Almost surely, 2^493965902421 is an apocalyptic number.

It is an amenable number.

493965902421 is a deficient number, since it is larger than the sum of its proper divisors (240897374379).

493965902421 is a wasteful number, since it uses less digits than its factorization.

493965902421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76548505 (or 76548499 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 493965902421 in words is "four hundred ninety-three billion, nine hundred sixty-five million, nine hundred two thousand, four hundred twenty-one".