15980602100 has 18 divisors (see below), whose sum is σ = 34677906774. Its totient is φ = 6392240800.

The previous prime is 15980602097. The next prime is 15980602129. The reversal of 15980602100 is 120608951.

It can be written as a sum of positive squares in 3 ways, for example, as 2630884 + 15977971216 = 1622^2 + 126404^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79902911 + ... + 79903110.

Almost surely, 2^15980602100 is an apocalyptic number.

15980602100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15980602100 is an abundant number, since it is smaller than the sum of its proper divisors (18697304674).

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

15980602100 is a wasteful number, since it uses less digits than its factorization.

15980602100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159806035 (or 159806028 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The spelling of 15980602100 in words is "fifteen billion, nine hundred eighty million, six hundred two thousand, one hundred".