2556140540207 has 4 divisors (see below), whose sum is σ = 2556791127120. Its totient is φ = 2555489953296.

The previous prime is 2556140540201. The next prime is 2556140540209. The reversal of 2556140540207 is 7020450416552.

2556140540207 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2556140540207 is a prime.

It is a super-2 number, since 2×2556140540207² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556140540201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325287563 + ... + 325295420.

It is an arithmetic number, because the mean of its divisors is an integer number (639197781780).

Almost surely, 2^{2556140540207} is an apocalyptic number.

2556140540207 is a deficient number, since it is larger than the sum of its proper divisors (650586913).

2556140540207 is an equidigital number, since it uses as much as digits as its factorization.

2556140540207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650586912.

The product of its (nonzero) digits is 336000, while the sum is 41.

Adding to 2556140540207 its reverse (7020450416552), we get a palindrome (9576590956759).

The spelling of 2556140540207 in words is "two trillion, five hundred fifty-six billion, one hundred forty million, five hundred forty thousand, two hundred seven".