15977680490 has 8 divisors (see below), whose sum is σ = 28759824900. Its totient is φ = 6391072192.

The previous prime is 15977680487. The next prime is 15977680517. The reversal of 15977680490 is 9408677951.

It can be written as a sum of positive squares in 2 ways, for example, as 15725410801 + 252269689 = 125401^2 + 15883^2 .

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

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, 798884015 + ... + 798884034.

Almost surely, 2^15977680490 is an apocalyptic number.

15977680490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15977680490 is a deficient number, since it is larger than the sum of its proper divisors (12782144410).

15977680490 is a wasteful number, since it uses less digits than its factorization.

15977680490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597768056.

The product of its (nonzero) digits is 3810240, while the sum is 56.

The spelling of 15977680490 in words is "fifteen billion, nine hundred seventy-seven million, six hundred eighty thousand, four hundred ninety".