15961210272 has 192 divisors, whose sum is σ = 55517736960. Its totient is φ = 4362031872.

The previous prime is 15961210247. The next prime is 15961210277. The reversal of 15961210272 is 27201216951.

15961210272 is a `hidden beast` number, since 1 + 5 + 9 + 612 + 10 + 27 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (15961210277) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81733 + ... + 196475.

It is an arithmetic number, because the mean of its divisors is an integer number (289154880).

Almost surely, 2^15961210272 is an apocalyptic number.

15961210272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15961210272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27758868480).

15961210272 is an abundant number, since it is smaller than the sum of its proper divisors (39556526688).

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

15961210272 is a wasteful number, since it uses less digits than its factorization.

15961210272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114792 (or 114778 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The spelling of 15961210272 in words is "fifteen billion, nine hundred sixty-one million, two hundred ten thousand, two hundred seventy-two".