261468612679 has 4 divisors (see below), whose sum is σ = 262309348080. Its totient is φ = 260627877280.

The previous prime is 261468612631. The next prime is 261468612701. The reversal of 261468612679 is 976216864162.

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 261468612679 - 2¹¹ = 261468610631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261468615679) 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, 420367234 + ... + 420367855.

It is an arithmetic number, because the mean of its divisors is an integer number (65577337020).

Almost surely, 2^261468612679 is an apocalyptic number.

261468612679 is a deficient number, since it is larger than the sum of its proper divisors (840735401).

261468612679 is an equidigital number, since it uses as much as digits as its factorization.

261468612679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840735400.

The product of its digits is 10450944, while the sum is 58.

The spelling of 261468612679 in words is "two hundred sixty-one billion, four hundred sixty-eight million, six hundred twelve thousand, six hundred seventy-nine".