1639094923880 has 16 divisors (see below), whose sum is σ = 3687963578820. Its totient is φ = 655637969536.

The previous prime is 1639094923867. The next prime is 1639094923897. The reversal of 1639094923880 is 883294909361.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1613961894724 + 25133029156 = 1270418^2 + 158534^2 .

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, 20488686509 + ... + 20488686588.

Almost surely, 2^{1639094923880} is an apocalyptic number.

1639094923880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1639094923880 is an abundant number, since it is smaller than the sum of its proper divisors (2048868654940).

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

1639094923880 is a wasteful number, since it uses less digits than its factorization.

1639094923880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40977373108 (or 40977373104 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 62.

The spelling of 1639094923880 in words is "one trillion, six hundred thirty-nine billion, ninety-four million, nine hundred twenty-three thousand, eight hundred eighty".