15780841088 has 64 divisors (see below), whose sum is σ = 31803273600. Its totient is φ = 7799390208.

The previous prime is 15780840989. The next prime is 15780841099. The reversal of 15780841088 is 88014808751.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4024793 + ... + 4028711.

It is an arithmetic number, because the mean of its divisors is an integer number (496926150).

Almost surely, 2^15780841088 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 15780841088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15901636800).

15780841088 is an abundant number, since it is smaller than the sum of its proper divisors (16022432512).

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

15780841088 is a wasteful number, since it uses less digits than its factorization.

15780841088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289 (or 4277 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 50.

The spelling of 15780841088 in words is "fifteen billion, seven hundred eighty million, eight hundred forty-one thousand, eighty-eight".