261250266054 has 16 divisors (see below), whose sum is σ = 522510230592. Its totient is φ = 87081805608.

The previous prime is 261250266023. The next prime is 261250266089. The reversal of 261250266054 is 450662052162.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 26824 + ... + 723339.

It is an arithmetic number, because the mean of its divisors is an integer number (32656889412).

Almost surely, 2^261250266054 is an apocalyptic number.

261250266054 is an abundant number, since it is smaller than the sum of its proper divisors (261259964538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261250266054 is a wasteful number, since it uses less digits than its factorization.

261250266054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808211.

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 261250266054 in words is "two hundred sixty-one billion, two hundred fifty million, two hundred sixty-six thousand, fifty-four".