15961766268 has 72 divisors (see below), whose sum is σ = 43466408832. Its totient is φ = 4545598176.

The previous prime is 15961766267. The next prime is 15961766279. The reversal of 15961766268 is 86266716951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15961766263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136305 + ... + 224727.

Almost surely, 2^15961766268 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 15961766268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21733204416).

15961766268 is an abundant number, since it is smaller than the sum of its proper divisors (27504642564).

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

15961766268 is a wasteful number, since it uses less digits than its factorization.

15961766268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88751 (or 88742 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 57.

The spelling of 15961766268 in words is "fifteen billion, nine hundred sixty-one million, seven hundred sixty-six thousand, two hundred sixty-eight".