381955591400 has 24 divisors (see below), whose sum is σ = 888046750470. Its totient is φ = 152782236480.

The previous prime is 381955591387. The next prime is 381955591421. The reversal of 381955591400 is 4195559183.

It can be written as a sum of positive squares in 3 ways, for example, as 309823597924 + 72131993476 = 556618^2 + 268574^2 .

It is a Harshad number since it is a multiple of its sum of digits (50).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 954888779 + ... + 954889178.

Almost surely, 2^381955591400 is an apocalyptic number.

It is an amenable number.

381955591400 is an abundant number, since it is smaller than the sum of its proper divisors (506091159070).

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

381955591400 is a wasteful number, since it uses less digits than its factorization.

381955591400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909777973 (or 1909777964 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 50.

The spelling of 381955591400 in words is "three hundred eighty-one billion, nine hundred fifty-five million, five hundred ninety-one thousand, four hundred".