261650376132567 has 4 divisors (see below), whose sum is σ = 348867168176760. Its totient is φ = 174433584088376.

The previous prime is 261650376132487. The next prime is 261650376132581. The reversal of 261650376132567 is 765231673056162.

It is a happy number.

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 261650376132567 - 2¹¹ = 261650376130519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261650376132567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261650376132767) 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, 43608396022092 + ... + 43608396022097.

It is an arithmetic number, because the mean of its divisors is an integer number (87216792044190).

Almost surely, 2^{261650376132567} is an apocalyptic number.

261650376132567 is a deficient number, since it is larger than the sum of its proper divisors (87216792044193).

261650376132567 is an equidigital number, since it uses as much as digits as its factorization.

261650376132567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87216792044192.

The product of its (nonzero) digits is 57153600, while the sum is 60.

The spelling of 261650376132567 in words is "two hundred sixty-one trillion, six hundred fifty billion, three hundred seventy-six million, one hundred thirty-two thousand, five hundred sixty-seven".