15660161061648 has 80 divisors (see below), whose sum is σ = 41172254836800. Its totient is φ = 5127692359680.

The previous prime is 15660161061619. The next prime is 15660161061653. The reversal of 15660161061648 is 84616016106651.

It is a self number, because there is not a number n which added to its sum of digits gives 15660161061648.

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, 1648068 + ... + 5834076.

It is an arithmetic number, because the mean of its divisors is an integer number (514653185460).

Almost surely, 2^{15660161061648} 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 15660161061648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20586127418400).

15660161061648 is an abundant number, since it is smaller than the sum of its proper divisors (25512093775152).

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

15660161061648 is a wasteful number, since it uses less digits than its factorization.

15660161061648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4187400 (or 4187394 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 51.

The spelling of 15660161061648 in words is "fifteen trillion, six hundred sixty billion, one hundred sixty-one million, sixty-one thousand, six hundred forty-eight".