381531464512 has 112 divisors (see below), whose sum is σ = 862299389952. Its totient is φ = 165794618880.

The previous prime is 381531464497. The next prime is 381531464519. The reversal of 381531464512 is 215464135183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381531464519) 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, 37025953 + ... + 37036255.

It is an arithmetic number, because the mean of its divisors is an integer number (7699101696).

Almost surely, 2^381531464512 is an apocalyptic number.

381531464512 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381531464512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (431149694976).

381531464512 is an abundant number, since it is smaller than the sum of its proper divisors (480767925440).

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

381531464512 is a wasteful number, since it uses less digits than its factorization.

381531464512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12636 (or 12626 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

Adding to 381531464512 its reverse (215464135183), we get a palindrome (596995599695).

The spelling of 381531464512 in words is "three hundred eighty-one billion, five hundred thirty-one million, four hundred sixty-four thousand, five hundred twelve".