261562726143079 has 2 divisors, whose sum is σ = 261562726143080. Its totient is φ = 261562726143078.

The previous prime is 261562726142969. The next prime is 261562726143101. The reversal of 261562726143079 is 970341627265162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261562726143079 - 2⁷ = 261562726142951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261562726143379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130781363071539 + 130781363071540.

It is an arithmetic number, because the mean of its divisors is an integer number (130781363071540).

Almost surely, 2^{261562726143079} is an apocalyptic number.

261562726143079 is a deficient number, since it is larger than the sum of its proper divisors (1).

261562726143079 is an equidigital number, since it uses as much as digits as its factorization.

261562726143079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45722880, while the sum is 61.

The spelling of 261562726143079 in words is "two hundred sixty-one trillion, five hundred sixty-two billion, seven hundred twenty-six million, one hundred forty-three thousand, seventy-nine".