261451013613067 has 4 divisors (see below), whose sum is σ = 261529503863656. Its totient is φ = 261372523362480.

The previous prime is 261451013613019. The next prime is 261451013613071. The reversal of 261451013613067 is 760316310154162.

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 261451013613067 - 2²³ = 261451005224459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261451013643067) 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, 39245120298 + ... + 39245126959.

It is an arithmetic number, because the mean of its divisors is an integer number (65382375965914).

Almost surely, 2^{261451013613067} is an apocalyptic number.

261451013613067 is a deficient number, since it is larger than the sum of its proper divisors (78490250589).

261451013613067 is an equidigital number, since it uses as much as digits as its factorization.

261451013613067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78490250588.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 261451013613067 in words is "two hundred sixty-one trillion, four hundred fifty-one billion, thirteen million, six hundred thirteen thousand, sixty-seven".