381465845421 has 16 divisors (see below), whose sum is σ = 535425816000. Its totient is φ = 240909977088.

The previous prime is 381465845417. The next prime is 381465845447. The reversal of 381465845421 is 124548564183.

It is not a de Polignac number, because 381465845421 - 2² = 381465845417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381465845461) 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, 688605 + ... + 1112253.

It is an arithmetic number, because the mean of its divisors is an integer number (33464113500).

Almost surely, 2^381465845421 is an apocalyptic number.

It is an amenable number.

381465845421 is a deficient number, since it is larger than the sum of its proper divisors (153959970579).

381465845421 is a wasteful number, since it uses less digits than its factorization.

381465845421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439468.

The product of its digits is 3686400, while the sum is 51.

The spelling of 381465845421 in words is "three hundred eighty-one billion, four hundred sixty-five million, eight hundred forty-five thousand, four hundred twenty-one".