261160656 has 20 divisors (see below), whose sum is σ = 674665152. Its totient is φ = 87053536.

The previous prime is 261160637. The next prime is 261160657. The reversal of 261160656 is 656061162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261160657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2720376 + ... + 2720471.

Almost surely, 2^261160656 is an apocalyptic number.

It is an amenable number.

261160656 is an abundant number, since it is smaller than the sum of its proper divisors (413504496).

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

261160656 is a wasteful number, since it uses less digits than its factorization.

261160656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5440858 (or 5440852 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 261160656 is about 16160.4658348700. The cubic root of 261160656 is about 639.1987498951.

The spelling of 261160656 in words is "two hundred sixty-one million, one hundred sixty thousand, six hundred fifty-six".