2559720565761 has 8 divisors (see below), whose sum is σ = 3496203699744. Its totient is φ = 1664858904480.

The previous prime is 2559720565747. The next prime is 2559720565769. The reversal of 2559720565761 is 1675650279552.

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

It is not a de Polignac number, because 2559720565761 - 2⁶ = 2559720565697 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2559720565695 and 2559720565704.

It is not an unprimeable number, because it can be changed into a prime (2559720565769) 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, 10405368031 + ... + 10405368276.

It is an arithmetic number, because the mean of its divisors is an integer number (437025462468).

Almost surely, 2^{2559720565761} is an apocalyptic number.

It is an amenable number.

2559720565761 is a deficient number, since it is larger than the sum of its proper divisors (936483133983).

2559720565761 is a wasteful number, since it uses less digits than its factorization.

2559720565761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20810736351.

The product of its (nonzero) digits is 39690000, while the sum is 60.

The spelling of 2559720565761 in words is "two trillion, five hundred fifty-nine billion, seven hundred twenty million, five hundred sixty-five thousand, seven hundred sixty-one".