2564442444652 has 18 divisors (see below), whose sum is σ = 4932842802524. Its totient is φ = 1165655656440.

The previous prime is 2564442444611. The next prime is 2564442444653.

It is a happy number.

2564442444652 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×2564442444652² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2564442444652.

It is not an unprimeable number, because it can be changed into a prime (2564442444653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2649216918 + ... + 2649217885.

Almost surely, 2^{2564442444652} is an apocalyptic number.

2564442444652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2564442444652 is a deficient number, since it is larger than the sum of its proper divisors (2368400357872).

2564442444652 is a wasteful number, since it uses less digits than its factorization.

2564442444652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5298434829 (or 5298434816 counting only the distinct ones).

The product of its digits is 29491200, while the sum is 52.

The spelling of 2564442444652 in words is "two trillion, five hundred sixty-four billion, four hundred forty-two million, four hundred forty-four thousand, six hundred fifty-two".