381609328128 has 120 divisors (see below), whose sum is σ = 1182611921832. Its totient is φ = 109031215104.

The previous prime is 381609328123. The next prime is 381609328141. The reversal of 381609328128 is 821823906183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381609328123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2459875 + ... + 2610402.

Almost surely, 2^381609328128 is an apocalyptic number.

It is an amenable number.

381609328128 is an abundant number, since it is smaller than the sum of its proper divisors (801002593704).

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

381609328128 is an equidigital number, since it uses as much as digits as its factorization.

381609328128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5070312 (or 5070289 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 51.

The spelling of 381609328128 in words is "three hundred eighty-one billion, six hundred nine million, three hundred twenty-eight thousand, one hundred twenty-eight".