2561236426 has 8 divisors (see below), whose sum is σ = 4390691040. Its totient is φ = 1097672748.

The previous prime is 2561236411. The next prime is 2561236429. The reversal of 2561236426 is 6246321652.

2561236426 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 not an unprimeable number, because it can be changed into a prime (2561236429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91472716 + ... + 91472743.

It is an arithmetic number, because the mean of its divisors is an integer number (548836380).

Almost surely, 2^2561236426 is an apocalyptic number.

2561236426 is a deficient number, since it is larger than the sum of its proper divisors (1829454614).

2561236426 is a wasteful number, since it uses less digits than its factorization.

2561236426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182945468.

The product of its digits is 103680, while the sum is 37.

The square root of 2561236426 is about 50608.6595949745. The cubic root of 2561236426 is about 1368.2009571779.

The spelling of 2561236426 in words is "two billion, five hundred sixty-one million, two hundred thirty-six thousand, four hundred twenty-six".