381396351999 has 16 divisors (see below), whose sum is σ = 565312047104. Its totient is φ = 227134303200.

The previous prime is 381396351989. The next prime is 381396352013. The reversal of 381396351999 is 999153693183.

It is a happy number.

It is not a de Polignac number, because 381396351999 - 2¹³ = 381396343807 is a prime.

It is a super-2 number, since 2×381396351999² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381396351989) 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, 157730947 + ... + 157733364.

It is an arithmetic number, because the mean of its divisors is an integer number (35332002944).

Almost surely, 2^381396351999 is an apocalyptic number.

381396351999 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

381396351999 is a deficient number, since it is larger than the sum of its proper divisors (183915695105).

381396351999 is a wasteful number, since it uses less digits than its factorization.

381396351999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315464358.

The product of its digits is 42515280, while the sum is 66.

The spelling of 381396351999 in words is "three hundred eighty-one billion, three hundred ninety-six million, three hundred fifty-one thousand, nine hundred ninety-nine".