381913128816 has 20 divisors (see below), whose sum is σ = 986608916232. Its totient is φ = 127304376256.

The previous prime is 381913128811. The next prime is 381913128827. The reversal of 381913128816 is 618821319183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381913128811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3978261711 + ... + 3978261806.

Almost surely, 2^381913128816 is an apocalyptic number.

It is an amenable number.

381913128816 is an abundant number, since it is smaller than the sum of its proper divisors (604695787416).

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

381913128816 is a wasteful number, since it uses less digits than its factorization.

381913128816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7956523528 (or 7956523522 counting only the distinct ones).

The product of its digits is 497664, while the sum is 51.

The spelling of 381913128816 in words is "three hundred eighty-one billion, nine hundred thirteen million, one hundred twenty-eight thousand, eight hundred sixteen".