381869973648 has 60 divisors (see below), whose sum is σ = 1081581555600. Its totient is φ = 125756372928.

The previous prime is 381869973647. The next prime is 381869973649. The reversal of 381869973648 is 846379968183.

It is an interprime number because it is at equal distance from previous prime (381869973647) and next prime (381869973649).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (381869973647) 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, 15963198 + ... + 15987101.

It is an arithmetic number, because the mean of its divisors is an integer number (18026359260).

Almost surely, 2^381869973648 is an apocalyptic number.

It is an amenable number.

381869973648 is an abundant number, since it is smaller than the sum of its proper divisors (699711581952).

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

381869973648 is a wasteful number, since it uses less digits than its factorization.

381869973648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31950396 (or 31950387 counting only the distinct ones).

The product of its digits is 376233984, while the sum is 72.

The spelling of 381869973648 in words is "three hundred eighty-one billion, eight hundred sixty-nine million, nine hundred seventy-three thousand, six hundred forty-eight".