261762057442211 has 4 divisors (see below), whose sum is σ = 263367959635272. Its totient is φ = 260156155249152.

The previous prime is 261762057442201. The next prime is 261762057442213. The reversal of 261762057442211 is 112244750267162.

261762057442211 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 is a cyclic number.

It is not a de Polignac number, because 261762057442211 - 2¹⁰ = 261762057441187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261762057442211.

It is not an unprimeable number, because it can be changed into a prime (261762057442213) 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, 802951096286 + ... + 802951096611.

It is an arithmetic number, because the mean of its divisors is an integer number (65841989908818).

Almost surely, 2^{261762057442211} is an apocalyptic number.

261762057442211 is a deficient number, since it is larger than the sum of its proper divisors (1605902193061).

261762057442211 is a wasteful number, since it uses less digits than its factorization.

261762057442211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605902193060.

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 261762057442211 in words is "two hundred sixty-one trillion, seven hundred sixty-two billion, fifty-seven million, four hundred forty-two thousand, two hundred eleven".