2556534310306 has 4 divisors (see below), whose sum is σ = 3834801465462. Its totient is φ = 1278267155152.

The previous prime is 2556534310261. The next prime is 2556534310307. The reversal of 2556534310306 is 6030134356552.

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., 2001644892025 + 554889418281 = 1414795^2 + 744909^2 .

It is not an unprimeable number, because it can be changed into a prime (2556534310307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639133577575 + ... + 639133577578.

Almost surely, 2^{2556534310306} is an apocalyptic number.

2556534310306 is a deficient number, since it is larger than the sum of its proper divisors (1278267155156).

2556534310306 is a wasteful number, since it uses less digits than its factorization.

2556534310306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278267155155.

The product of its (nonzero) digits is 972000, while the sum is 43.

Adding to 2556534310306 its reverse (6030134356552), we get a palindrome (8586668666858).

The spelling of 2556534310306 in words is "two trillion, five hundred fifty-six billion, five hundred thirty-four million, three hundred ten thousand, three hundred six".