381987799810 has 16 divisors (see below), whose sum is σ = 687592439352. Its totient is φ = 152791920000.

The previous prime is 381987799769. The next prime is 381987799829. The reversal of 381987799810 is 18997789183.

It can be written as a sum of positive squares in 4 ways, for example, as 380544635689 + 1443164121 = 616883^2 + 37989^2 .

It is a super-2 number, since 2×381987799810² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 381987799810.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135520 + ... + 884500.

Almost surely, 2^381987799810 is an apocalyptic number.

381987799810 is a deficient number, since it is larger than the sum of its proper divisors (305604639542).

381987799810 is a wasteful number, since it uses less digits than its factorization.

381987799810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799989.

The product of its (nonzero) digits is 54867456, while the sum is 70.

The spelling of 381987799810 in words is "three hundred eighty-one billion, nine hundred eighty-seven million, seven hundred ninety-nine thousand, eight hundred ten".