261655433716513 has 8 divisors (see below), whose sum is σ = 270869845433600. Its totient is φ = 252489391615440.

The previous prime is 261655433716511. The next prime is 261655433716517. The reversal of 261655433716513 is 315617334556162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261655433716513 - 2¹ = 261655433716511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261655433716511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12092392995 + ... + 12092414632.

It is an arithmetic number, because the mean of its divisors is an integer number (33858730679200).

Almost surely, 2^{261655433716513} is an apocalyptic number.

It is an amenable number.

261655433716513 is a deficient number, since it is larger than the sum of its proper divisors (9214411717087).

261655433716513 is a wasteful number, since it uses less digits than its factorization.

261655433716513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24184808007.

The product of its digits is 40824000, while the sum is 58.

The spelling of 261655433716513 in words is "two hundred sixty-one trillion, six hundred fifty-five billion, four hundred thirty-three million, seven hundred sixteen thousand, five hundred thirteen".