2561426352660 has 48 divisors (see below), whose sum is σ = 8196564329856. Its totient is φ = 585468880512.

The previous prime is 2561426352637. The next prime is 2561426352673. The reversal of 2561426352660 is 662536241652.

It is a super-2 number, since 2×2561426352660² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3049316667 + ... + 3049317506.

It is an arithmetic number, because the mean of its divisors is an integer number (170761756872).

Almost surely, 2^{2561426352660} is an apocalyptic number.

2561426352660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2561426352660 is an abundant number, since it is smaller than the sum of its proper divisors (5635137977196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2561426352660 is a wasteful number, since it uses less digits than its factorization.

2561426352660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6098634192 (or 6098634190 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 2561426352660 in words is "two trillion, five hundred sixty-one billion, four hundred twenty-six million, three hundred fifty-two thousand, six hundred sixty".