261536056 has 16 divisors (see below), whose sum is σ = 495437040. Its totient is φ = 129419520.

The previous prime is 261536039. The next prime is 261536101. The reversal of 261536056 is 650635162.

It is a super-2 number, since 2×261536056² = 136802217176070272, which contains 22 as substring.

It is a congruent number.

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, 167740 + ... + 169291.

It is an arithmetic number, because the mean of its divisors is an integer number (30964815).

Almost surely, 2^261536056 is an apocalyptic number.

It is an amenable number.

261536056 is a deficient number, since it is larger than the sum of its proper divisors (233900984).

261536056 is a wasteful number, since it uses less digits than its factorization.

261536056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337134 (or 337130 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 261536056 is about 16172.0764282142. The cubic root of 261536056 is about 639.5048709538.

The spelling of 261536056 in words is "two hundred sixty-one million, five hundred thirty-six thousand, fifty-six".