2561305706476 has 18 divisors (see below), whose sum is σ = 4926809118140. Its totient is φ = 1164229866360.

The previous prime is 2561305706423. The next prime is 2561305706483. The reversal of 2561305706476 is 6746075031652.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2645976486 + ... + 2645977453.

Almost surely, 2^{2561305706476} is an apocalyptic number.

It is an amenable number.

2561305706476 is a deficient number, since it is larger than the sum of its proper divisors (2365503411664).

2561305706476 is a wasteful number, since it uses less digits than its factorization.

2561305706476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5291953965 (or 5291953952 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 52.

The spelling of 2561305706476 in words is "two trillion, five hundred sixty-one billion, three hundred five million, seven hundred six thousand, four hundred seventy-six".