381138377556 has 24 divisors (see below), whose sum is σ = 889724805984. Its totient is φ = 126988708000.

The previous prime is 381138377513. The next prime is 381138377569. The reversal of 381138377556 is 655773831183.

It is a junction number, because it is equal to n+sod(n) for n = 381138377496 and 381138377505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7149570 + ... + 7202681.

It is an arithmetic number, because the mean of its divisors is an integer number (37071866916).

Almost surely, 2^381138377556 is an apocalyptic number.

It is an amenable number.

381138377556 is an abundant number, since it is smaller than the sum of its proper divisors (508586428428).

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

381138377556 is a wasteful number, since it uses less digits than its factorization.

381138377556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14354471 (or 14354469 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 57.

The spelling of 381138377556 in words is "three hundred eighty-one billion, one hundred thirty-eight million, three hundred seventy-seven thousand, five hundred fifty-six".