2561331455423 has 8 divisors (see below), whose sum is σ = 2758459691568. Its totient is φ = 2364217896384.

The previous prime is 2561331455401. The next prime is 2561331455453. The reversal of 2561331455423 is 3245541331652.

2561331455423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2561331455423 - 2³⁰ = 2560257713599 is a prime.

It is a super-2 number, since 2×2561331455423² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561331455453) 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, 3305486 + ... + 4006107.

It is an arithmetic number, because the mean of its divisors is an integer number (344807461446).

Almost surely, 2^{2561331455423} is an apocalyptic number.

2561331455423 is a deficient number, since it is larger than the sum of its proper divisors (197128236145).

2561331455423 is a wasteful number, since it uses less digits than its factorization.

2561331455423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7338553.

The product of its digits is 1296000, while the sum is 44.

The spelling of 2561331455423 in words is "two trillion, five hundred sixty-one billion, three hundred thirty-one million, four hundred fifty-five thousand, four hundred twenty-three".