16031261568 has 128 divisors (see below), whose sum is σ = 48862275840. Its totient is φ = 4561920000.

The previous prime is 16031261557. The next prime is 16031261599. The reversal of 16031261568 is 86516213061.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 662808 + ... + 686568.

It is an arithmetic number, because the mean of its divisors is an integer number (381736530).

Almost surely, 2^16031261568 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 16031261568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24431137920).

16031261568 is an abundant number, since it is smaller than the sum of its proper divisors (32831014272).

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

16031261568 is a wasteful number, since it uses less digits than its factorization.

16031261568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24036 (or 24024 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 16031261568 in words is "sixteen billion, thirty-one million, two hundred sixty-one thousand, five hundred sixty-eight".