16615491088 has 80 divisors (see below), whose sum is σ = 38877511680. Its totient is φ = 6725017728.

The previous prime is 16615491077. The next prime is 16615491107. The reversal of 16615491088 is 88019451661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162681 + ... + 244327.

It is an arithmetic number, because the mean of its divisors is an integer number (485968896).

Almost surely, 2^16615491088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16615491088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19438755840).

16615491088 is an abundant number, since it is smaller than the sum of its proper divisors (22262020592).

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

16615491088 is a wasteful number, since it uses less digits than its factorization.

16615491088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81764 (or 81758 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 49.

The spelling of 16615491088 in words is "sixteen billion, six hundred fifteen million, four hundred ninety-one thousand, eighty-eight".