381955591401 has 16 divisors (see below), whose sum is σ = 514033879680. Its totient is φ = 252259400960.

The previous prime is 381955591387. The next prime is 381955591421. The reversal of 381955591401 is 104195559183.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 381955591401 - 2⁹ = 381955590889 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (381955591421) 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, 414931 + ... + 967511.

It is an arithmetic number, because the mean of its divisors is an integer number (32127117480).

Almost surely, 2^381955591401 is an apocalyptic number.

It is an amenable number.

381955591401 is a deficient number, since it is larger than the sum of its proper divisors (132078288279).

381955591401 is a wasteful number, since it uses less digits than its factorization.

381955591401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554736.

The product of its (nonzero) digits is 972000, while the sum is 51.

The spelling of 381955591401 in words is "three hundred eighty-one billion, nine hundred fifty-five million, five hundred ninety-one thousand, four hundred one".