261762057256601 has 4 divisors (see below), whose sum is σ = 285558607916304. Its totient is φ = 237965506596900.

The previous prime is 261762057256577. The next prime is 261762057256663. The reversal of 261762057256601 is 106652750267162.

261762057256601 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 261762057256601 - 2²⁶ = 261761990147737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261762057256681) 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, 11898275329835 + ... + 11898275329856.

It is an arithmetic number, because the mean of its divisors is an integer number (71389651979076).

Almost surely, 2^{261762057256601} is an apocalyptic number.

It is an amenable number.

261762057256601 is a deficient number, since it is larger than the sum of its proper divisors (23796550659703).

261762057256601 is a wasteful number, since it uses less digits than its factorization.

261762057256601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23796550659702.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 261762057256601 in words is "two hundred sixty-one trillion, seven hundred sixty-two billion, fifty-seven million, two hundred fifty-six thousand, six hundred one".