2561366001 has 8 divisors (see below), whose sum is σ = 3419379360. Its totient is φ = 1705464992.

The previous prime is 2561365957. The next prime is 2561366011. The reversal of 2561366001 is 1006631652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2561366001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2561366001.

It is not an unprimeable number, because it can be changed into a prime (2561366011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525255 + ... + 530108.

It is an arithmetic number, because the mean of its divisors is an integer number (427422420).

Almost surely, 2^2561366001 is an apocalyptic number.

It is an amenable number.

2561366001 is a deficient number, since it is larger than the sum of its proper divisors (858013359).

2561366001 is a wasteful number, since it uses less digits than its factorization.

2561366001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056175.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 2561366001 is about 50609.9397450738. The cubic root of 2561366001 is about 1368.2240295825.

Adding to 2561366001 its reverse (1006631652), we get a palindrome (3567997653).

The spelling of 2561366001 in words is "two billion, five hundred sixty-one million, three hundred sixty-six thousand, one".