261562726143001 has 4 divisors (see below), whose sum is σ = 261562838210100. Its totient is φ = 261562614075904.

The previous prime is 261562726142969. The next prime is 261562726143079. The reversal of 261562726143001 is 100341627265162.

261562726143001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23468598913600 + 238094127229401 = 4844440^2 + 15430299^2 .

It is a cyclic number.

It is not a de Polignac number, because 261562726143001 - 2⁵ = 261562726142969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261562726143101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52456456 + ... + 57225913.

It is an arithmetic number, because the mean of its divisors is an integer number (65390709552525).

Almost surely, 2^{261562726143001} is an apocalyptic number.

It is an amenable number.

261562726143001 is a deficient number, since it is larger than the sum of its proper divisors (112067099).

261562726143001 is a wasteful number, since it uses less digits than its factorization.

261562726143001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112067098.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 261562726143001 in words is "two hundred sixty-one trillion, five hundred sixty-two billion, seven hundred twenty-six million, one hundred forty-three thousand, one".