381553650544 has 20 divisors (see below), whose sum is σ = 806465670840. Its totient is φ = 173433477440.

The previous prime is 381553650521. The next prime is 381553650589. The reversal of 381553650544 is 445056355183.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1083959059 + ... + 1083959410.

It is an arithmetic number, because the mean of its divisors is an integer number (40323283542).

Almost surely, 2^381553650544 is an apocalyptic number.

It is an amenable number.

381553650544 is an abundant number, since it is smaller than the sum of its proper divisors (424912020296).

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

381553650544 is a wasteful number, since it uses less digits than its factorization.

381553650544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2167918488 (or 2167918482 counting only the distinct ones).

The product of its (nonzero) digits is 4320000, while the sum is 49.

The spelling of 381553650544 in words is "three hundred eighty-one billion, five hundred fifty-three million, six hundred fifty thousand, five hundred forty-four".