2566388108434 has 4 divisors (see below), whose sum is σ = 3849582162654. Its totient is φ = 1283194054216.

The previous prime is 2566388108423. The next prime is 2566388108437. The reversal of 2566388108434 is 4348018836652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2566067591025 + 320517409 = 1601895^2 + 17903^2 .

It is a super-2 number, since 2×2566388108434² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2566388108437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641597027107 + ... + 641597027110.

Almost surely, 2^{2566388108434} is an apocalyptic number.

2566388108434 is a deficient number, since it is larger than the sum of its proper divisors (1283194054220).

2566388108434 is a wasteful number, since it uses less digits than its factorization.

2566388108434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283194054219.

The product of its (nonzero) digits is 26542080, while the sum is 58.

The spelling of 2566388108434 in words is "two trillion, five hundred sixty-six billion, three hundred eighty-eight million, one hundred eight thousand, four hundred thirty-four".