15661610016100 has 72 divisors (see below), whose sum is σ = 34006105032480. Its totient is φ = 6260882968320.

The previous prime is 15661610016097. The next prime is 15661610016109. The reversal of 15661610016100 is 161001616651.

15661610016100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (15661610016109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1649106552 + ... + 1649116048.

It is an arithmetic number, because the mean of its divisors is an integer number (472307014340).

Almost surely, 2^{15661610016100} is an apocalyptic number.

15661610016100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15661610016100 is an abundant number, since it is smaller than the sum of its proper divisors (18344495016380).

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

15661610016100 is a wasteful number, since it uses less digits than its factorization.

15661610016100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17677 (or 17670 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 34.

The spelling of 15661610016100 in words is "fifteen trillion, six hundred sixty-one billion, six hundred ten million, sixteen thousand, one hundred".