261116956 has 12 divisors (see below), whose sum is σ = 463775368. Its totient is φ = 128609712.

The previous prime is 261116951. The next prime is 261116959. The reversal of 261116956 is 659611162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261116951) 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, 486891 + ... + 487426.

Almost surely, 2^261116956 is an apocalyptic number.

It is an amenable number.

261116956 is a deficient number, since it is larger than the sum of its proper divisors (202658412).

261116956 is a wasteful number, since it uses less digits than its factorization.

261116956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974388 (or 974386 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 261116956 is about 16159.1137133198. The cubic root of 261116956 is about 639.1630955410.

The spelling of 261116956 in words is "two hundred sixty-one million, one hundred sixteen thousand, nine hundred fifty-six".