261525530255 has 16 divisors (see below), whose sum is σ = 342473642784. Its totient is φ = 190137636480.

The previous prime is 261525530243. The next prime is 261525530261. The reversal of 261525530255 is 552035525162.

It is not a de Polignac number, because 261525530255 - 2²⁰ = 261524481679 is a prime.

It is a Duffinian number.

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, 615812 + ... + 949881.

It is an arithmetic number, because the mean of its divisors is an integer number (21404602674).

Almost surely, 2^261525530255 is an apocalyptic number.

261525530255 is a deficient number, since it is larger than the sum of its proper divisors (80948112529).

261525530255 is a wasteful number, since it uses less digits than its factorization.

261525530255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568746.

The product of its (nonzero) digits is 450000, while the sum is 41.

The spelling of 261525530255 in words is "two hundred sixty-one billion, five hundred twenty-five million, five hundred thirty thousand, two hundred fifty-five".