261265212476407 has 8 divisors (see below), whose sum is σ = 275116055390000. Its totient is φ = 247424373788544.

The previous prime is 261265212476381. The next prime is 261265212476459. The reversal of 261265212476407 is 704674212562162.

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

It is a cyclic number.

It is not a de Polignac number, because 261265212476407 - 2¹⁹ = 261265211952119 is a prime.

It is a super-2 number, since 2×261265212476407² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261265212476507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2501002818 + ... + 2501107279.

It is an arithmetic number, because the mean of its divisors is an integer number (34389506923750).

Almost surely, 2^{261265212476407} is an apocalyptic number.

261265212476407 is a deficient number, since it is larger than the sum of its proper divisors (13850842913593).

261265212476407 is a wasteful number, since it uses less digits than its factorization.

261265212476407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5002112865.

The product of its (nonzero) digits is 13547520, while the sum is 55.

The spelling of 261265212476407 in words is "two hundred sixty-one trillion, two hundred sixty-five billion, two hundred twelve million, four hundred seventy-six thousand, four hundred seven".