261613095 has 16 divisors (see below), whose sum is σ = 423626112. Its totient is φ = 137845280.

The previous prime is 261613081. The next prime is 261613111. The reversal of 261613095 is 590316162.

It is a happy number.

It is not a de Polignac number, because 261613095 - 2⁹ = 261612583 is a prime.

It is a super-2 number, since 2×261613095² = 136882822950958050, 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 15 ways as a sum of consecutive naturals, for example, 103821 + ... + 106310.

It is an arithmetic number, because the mean of its divisors is an integer number (26476632).

Almost surely, 2^261613095 is an apocalyptic number.

261613095 is a deficient number, since it is larger than the sum of its proper divisors (162013017).

261613095 is a wasteful number, since it uses less digits than its factorization.

261613095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210222.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 261613095 is about 16174.4581052968. The cubic root of 261613095 is about 639.5676564067.

The spelling of 261613095 in words is "two hundred sixty-one million, six hundred thirteen thousand, ninety-five".