261113755 has 16 divisors (see below), whose sum is σ = 361580544. Its totient is φ = 177308640.

The previous prime is 261113737. The next prime is 261113771. The reversal of 261113755 is 557311162.

261113755 = T₁₃₂ + T₁₃₃ + ... + T₁₁₆₁.

It is not a de Polignac number, because 261113755 - 2¹⁹ = 260589467 is a prime.

It is a Duffinian 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, 32611 + ... + 39820.

It is an arithmetic number, because the mean of its divisors is an integer number (22598784).

Almost surely, 2^261113755 is an apocalyptic number.

261113755 is a deficient number, since it is larger than the sum of its proper divisors (100466789).

261113755 is a wasteful number, since it uses less digits than its factorization.

261113755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72546.

The product of its digits is 6300, while the sum is 31.

The square root of 261113755 is about 16159.0146667425. The cubic root of 261113755 is about 639.1604837236.

The spelling of 261113755 in words is "two hundred sixty-one million, one hundred thirteen thousand, seven hundred fifty-five".