381988443085 has 16 divisors (see below), whose sum is σ = 460751385600. Its totient is φ = 304014332160.

The previous prime is 381988443077. The next prime is 381988443113. The reversal of 381988443085 is 580344889183.

It is not a de Polignac number, because 381988443085 - 2³ = 381988443077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8974564 + ... + 9017026.

It is an arithmetic number, because the mean of its divisors is an integer number (28796961600).

Almost surely, 2^381988443085 is an apocalyptic number.

It is an amenable number.

381988443085 is a deficient number, since it is larger than the sum of its proper divisors (78762942515).

381988443085 is a wasteful number, since it uses less digits than its factorization.

381988443085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51708.

The product of its (nonzero) digits is 26542080, while the sum is 61.

The spelling of 381988443085 in words is "three hundred eighty-one billion, nine hundred eighty-eight million, four hundred forty-three thousand, eighty-five".