381017951999 has 16 divisors (see below), whose sum is σ = 418567123200. Its totient is φ = 345222668736.

The previous prime is 381017951983. The next prime is 381017952013. The reversal of 381017951999 is 999159710183.

It is not a de Polignac number, because 381017951999 - 2⁴ = 381017951983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381017951959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3331832 + ... + 3444290.

It is an arithmetic number, because the mean of its divisors is an integer number (26160445200).

Almost surely, 2^381017951999 is an apocalyptic number.

381017951999 is a deficient number, since it is larger than the sum of its proper divisors (37549171201).

381017951999 is a wasteful number, since it uses less digits than its factorization.

381017951999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120254.

The product of its (nonzero) digits is 5511240, while the sum is 62.

The spelling of 381017951999 in words is "three hundred eighty-one billion, seventeen million, nine hundred fifty-one thousand, nine hundred ninety-nine".