2564673553 has 8 divisors (see below), whose sum is σ = 2826188288. Its totient is φ = 2312334864.

The previous prime is 2564673539. The next prime is 2564673613. The reversal of 2564673553 is 3553764652.

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 2564673553 - 2⁵ = 2564673521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2564673253) 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, 2293425 + ... + 2294542.

It is an arithmetic number, because the mean of its divisors is an integer number (353273536).

Almost surely, 2^2564673553 is an apocalyptic number.

It is an amenable number.

2564673553 is a deficient number, since it is larger than the sum of its proper divisors (261514735).

2564673553 is a wasteful number, since it uses less digits than its factorization.

2564673553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4588023.

The product of its digits is 2268000, while the sum is 46.

The square root of 2564673553 is about 50642.6061039516. The cubic root of 2564673553 is about 1368.8127161883.

It can be divided in two parts, 25646 and 73553, that added together give a palindrome (99199).

The spelling of 2564673553 in words is "two billion, five hundred sixty-four million, six hundred seventy-three thousand, five hundred fifty-three".