261250266053 has 16 divisors (see below), whose sum is σ = 322861054464. Its totient is φ = 206272331520.

The previous prime is 261250266023. The next prime is 261250266089. The reversal of 261250266053 is 350662052162.

It is a de Polignac number, because none of the positive numbers 2^k-261250266053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 261250265998 and 261250266016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261250266023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23349518 + ... + 23360703.

It is an arithmetic number, because the mean of its divisors is an integer number (20178815904).

Almost surely, 2^261250266053 is an apocalyptic number.

It is an amenable number.

261250266053 is a deficient number, since it is larger than the sum of its proper divisors (61610788411).

261250266053 is a wasteful number, since it uses less digits than its factorization.

261250266053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46710292.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 261250266053 in words is "two hundred sixty-one billion, two hundred fifty million, two hundred sixty-six thousand, fifty-three".