261495230577 has 8 divisors (see below), whose sum is σ = 398468922816. Its totient is φ = 149425846032.

The previous prime is 261495230497. The next prime is 261495230597. The reversal of 261495230577 is 775032594162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261495230577 - 2¹¹ = 261495228529 is a prime.

It is a super-2 number, since 2×261495230577² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (261495230597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6226076898 + ... + 6226076939.

It is an arithmetic number, because the mean of its divisors is an integer number (49808615352).

Almost surely, 2^261495230577 is an apocalyptic number.

It is an amenable number.

261495230577 is a deficient number, since it is larger than the sum of its proper divisors (136973692239).

261495230577 is a wasteful number, since it uses less digits than its factorization.

261495230577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12452153847.

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 261495230577 in words is "two hundred sixty-one billion, four hundred ninety-five million, two hundred thirty thousand, five hundred seventy-seven".