381802403690 has 8 divisors (see below), whose sum is σ = 687244326660. Its totient is φ = 152720961472.

The previous prime is 381802403663. The next prime is 381802403711. The reversal of 381802403690 is 96304208183.

It can be written as a sum of positive squares in 2 ways, for example, as 365506094041 + 16296309649 = 604571^2 + 127657^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×381802403690² (a number of 24 digits) contains 22 as substring.

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, 19090120175 + ... + 19090120194.

Almost surely, 2^381802403690 is an apocalyptic number.

381802403690 is a deficient number, since it is larger than the sum of its proper divisors (305441922970).

381802403690 is a wasteful number, since it uses less digits than its factorization.

381802403690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38180240376.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 381802403690 in words is "three hundred eighty-one billion, eight hundred two million, four hundred three thousand, six hundred ninety".