261965095 has 32 divisors (see below), whose sum is σ = 364953600. Its totient is φ = 176818560.

The previous prime is 261965089. The next prime is 261965107. The reversal of 261965095 is 590569162.

It is not a de Polignac number, because 261965095 - 2²¹ = 259867943 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 995934 + ... + 996196.

It is an arithmetic number, because the mean of its divisors is an integer number (11404800).

Almost surely, 2^261965095 is an apocalyptic number.

261965095 is a deficient number, since it is larger than the sum of its proper divisors (102988505).

261965095 is a wasteful number, since it uses less digits than its factorization.

261965095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 261965095 is about 16185.3358012739. The cubic root of 261965095 is about 639.8543736048.

The spelling of 261965095 in words is "two hundred sixty-one million, nine hundred sixty-five thousand, ninety-five".