15617171616 has 96 divisors (see below), whose sum is σ = 41841515520. Its totient is φ = 5098884864.

The previous prime is 15617171597. The next prime is 15617171617. The reversal of 15617171616 is 61617171651.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (15617171617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1598041 + ... + 1607783.

It is an arithmetic number, because the mean of its divisors is an integer number (435849120).

Almost surely, 2^15617171616 is an apocalyptic number.

15617171616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15617171616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20920757760).

15617171616 is an abundant number, since it is smaller than the sum of its proper divisors (26224343904).

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

15617171616 is a wasteful number, since it uses less digits than its factorization.

15617171616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10098 (or 10090 counting only the distinct ones).

The product of its digits is 52920, while the sum is 42.

The spelling of 15617171616 in words is "fifteen billion, six hundred seventeen million, one hundred seventy-one thousand, six hundred sixteen".