261160956 has 48 divisors (see below), whose sum is σ = 773812480. Its totient is φ = 74617200.

The previous prime is 261160943. The next prime is 261161009. The reversal of 261160956 is 659061162.

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

It is a self number, because there is not a number n which added to its sum of digits gives 261160956.

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, 171970 + ... + 173481.

Almost surely, 2^261160956 is an apocalyptic number.

It is an amenable number.

261160956 is an abundant number, since it is smaller than the sum of its proper divisors (512651524).

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

261160956 is a wasteful number, since it uses less digits than its factorization.

261160956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345471 (or 345463 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 261160956 is about 16160.4751167780. The cubic root of 261160956 is about 639.1989946481.

The spelling of 261160956 in words is "two hundred sixty-one million, one hundred sixty thousand, nine hundred fifty-six".