383812139520 has 120 divisors (see below), whose sum is σ = 1329249466116. Its totient is φ = 102349897728.

The previous prime is 383812139519. The next prime is 383812139531. The reversal of 383812139520 is 25931218383.

383812139520 is a `hidden beast` number, since 3 + 8 + 381 + 213 + 9 + 52 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 364448860416 + 19363279104 = 603696^2 + 139152^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8306217 + ... + 8352296.

Almost surely, 2^383812139520 is an apocalyptic number.

383812139520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

383812139520 is an abundant number, since it is smaller than the sum of its proper divisors (945437326596).

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

383812139520 is a wasteful number, since it uses less digits than its factorization.

383812139520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16658542 (or 16658523 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 383812139520 in words is "three hundred eighty-three billion, eight hundred twelve million, one hundred thirty-nine thousand, five hundred twenty".