381999983964 has 24 divisors (see below), whose sum is σ = 943764666768. Its totient is φ = 119843132160.

The previous prime is 381999983933. The next prime is 381999983983. The reversal of 381999983964 is 469389999183.

It is a self number, because there is not a number n which added to its sum of digits gives 381999983964.

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, 936274267 + ... + 936274674.

It is an arithmetic number, because the mean of its divisors is an integer number (39323527782).

Almost surely, 2^381999983964 is an apocalyptic number.

381999983964 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

381999983964 is an abundant number, since it is smaller than the sum of its proper divisors (561764682804).

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

381999983964 is a wasteful number, since it uses less digits than its factorization.

381999983964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872548965 (or 1872548963 counting only the distinct ones).

The product of its digits is 816293376, while the sum is 78.

The spelling of 381999983964 in words is "three hundred eighty-one billion, nine hundred ninety-nine million, nine hundred eighty-three thousand, nine hundred sixty-four".