261675142420767 has 4 divisors (see below), whose sum is σ = 348900189894360. Its totient is φ = 174450094947176.

The previous prime is 261675142420711. The next prime is 261675142420801. The reversal of 261675142420767 is 767024241576162.

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 261675142420767 - 2⁷ = 261675142420639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261675142420767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261675142420667) 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, 43612523736792 + ... + 43612523736797.

It is an arithmetic number, because the mean of its divisors is an integer number (87225047473590).

Almost surely, 2^{261675142420767} is an apocalyptic number.

261675142420767 is a deficient number, since it is larger than the sum of its proper divisors (87225047473593).

261675142420767 is an equidigital number, since it uses as much as digits as its factorization.

261675142420767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87225047473592.

The product of its (nonzero) digits is 47416320, while the sum is 60.

The spelling of 261675142420767 in words is "two hundred sixty-one trillion, six hundred seventy-five billion, one hundred forty-two million, four hundred twenty thousand, seven hundred sixty-seven".