961281568 has 24 divisors (see below), whose sum is σ = 2038102668. Its totient is φ = 443668224.

The previous prime is 961281547. The next prime is 961281583. The reversal of 961281568 is 865182169.

It can be written as a sum of positive squares in 2 ways, for example, as 750102544 + 211179024 = 27388^2 + 14532^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1154971 + ... + 1155802.

Almost surely, 2^961281568 is an apocalyptic number.

It is an amenable number.

961281568 is an abundant number, since it is smaller than the sum of its proper divisors (1076821100).

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

961281568 is a wasteful number, since it uses less digits than its factorization.

961281568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310796 (or 2310788 counting only the distinct ones).

The product of its digits is 207360, while the sum is 46.

The square root of 961281568 is about 31004.5410867505. The cubic root of 961281568 is about 986.9236093263.

The spelling of 961281568 in words is "nine hundred sixty-one million, two hundred eighty-one thousand, five hundred sixty-eight".