261130234553 has 16 divisors (see below), whose sum is σ = 265625671680. Its totient is φ = 256666999056.

The previous prime is 261130234489. The next prime is 261130234601. The reversal of 261130234553 is 355432031162.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 261130234553 - 2⁶ = 261130234489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261130236553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17728850 + ... + 17743572.

It is an arithmetic number, because the mean of its divisors is an integer number (16601604480).

Almost surely, 2^261130234553 is an apocalyptic number.

It is an amenable number.

261130234553 is a deficient number, since it is larger than the sum of its proper divisors (4495437127).

261130234553 is a wasteful number, since it uses less digits than its factorization.

261130234553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15796.

The product of its (nonzero) digits is 64800, while the sum is 35.

The spelling of 261130234553 in words is "two hundred sixty-one billion, one hundred thirty million, two hundred thirty-four thousand, five hundred fifty-three".