2564356655 has 8 divisors (see below), whose sum is σ = 3516832032. Its totient is φ = 1758415968.

The previous prime is 2564356649. The next prime is 2564356657. The reversal of 2564356655 is 5566534652.

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

It is a cyclic number.

It is not a de Polignac number, because 2564356655 - 2¹² = 2564352559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564356657) 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, 36633632 + ... + 36633701.

It is an arithmetic number, because the mean of its divisors is an integer number (439604004).

Almost surely, 2^2564356655 is an apocalyptic number.

2564356655 is a deficient number, since it is larger than the sum of its proper divisors (952475377).

2564356655 is an equidigital number, since it uses as much as digits as its factorization.

2564356655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73267345.

The product of its digits is 3240000, while the sum is 47.

The square root of 2564356655 is about 50639.4772386130. The cubic root of 2564356655 is about 1368.7563357991.

The spelling of 2564356655 in words is "two billion, five hundred sixty-four million, three hundred fifty-six thousand, six hundred fifty-five".