261282288240001 has 16 divisors (see below), whose sum is σ = 305899014919680. Its totient is φ = 218488502776320.

The previous prime is 261282288239957. The next prime is 261282288240041. The reversal of 261282288240001 is 100042882282162.

It is a de Polignac number, because none of the positive numbers 2^k-261282288240001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261282288240041) 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, 417385 + ... + 22863481.

It is an arithmetic number, because the mean of its divisors is an integer number (19118688432480).

Almost surely, 2^{261282288240001} is an apocalyptic number.

It is an amenable number.

261282288240001 is a deficient number, since it is larger than the sum of its proper divisors (44616726679679).

261282288240001 is a wasteful number, since it uses less digits than its factorization.

261282288240001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22486704.

The product of its (nonzero) digits is 393216, while the sum is 46.

The spelling of 261282288240001 in words is "two hundred sixty-one trillion, two hundred eighty-two billion, two hundred eighty-eight million, two hundred forty thousand, one".