2561623734476 has 48 divisors (see below), whose sum is σ = 4617860587200. Its totient is φ = 1242787553280.

The previous prime is 2561623734443. The next prime is 2561623734521. The reversal of 2561623734476 is 6744373261652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28724516 + ... + 28813556.

It is an arithmetic number, because the mean of its divisors is an integer number (96205428900).

Almost surely, 2^{2561623734476} is an apocalyptic number.

It is an amenable number.

2561623734476 is a deficient number, since it is larger than the sum of its proper divisors (2056236852724).

2561623734476 is a wasteful number, since it uses less digits than its factorization.

2561623734476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90594 (or 90592 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 56.

The spelling of 2561623734476 in words is "two trillion, five hundred sixty-one billion, six hundred twenty-three million, seven hundred thirty-four thousand, four hundred seventy-six".