2561612572726 has 32 divisors (see below), whose sum is σ = 4114598031360. Its totient is φ = 1192590042336.

The previous prime is 2561612572697. The next prime is 2561612572733. The reversal of 2561612572726 is 6272752161652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1963965 + ... + 2996728.

It is an arithmetic number, because the mean of its divisors is an integer number (128581188480).

Almost surely, 2^{2561612572726} is an apocalyptic number.

2561612572726 is a deficient number, since it is larger than the sum of its proper divisors (1552985458634).

2561612572726 is a wasteful number, since it uses less digits than its factorization.

2561612572726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4960948.

The product of its digits is 4233600, while the sum is 52.

The spelling of 2561612572726 in words is "two trillion, five hundred sixty-one billion, six hundred twelve million, five hundred seventy-two thousand, seven hundred twenty-six".