2556140540206 has 64 divisors (see below), whose sum is σ = 4291057140480. Its totient is φ = 1131947228160.

The previous prime is 2556140540201. The next prime is 2556140540209. The reversal of 2556140540206 is 6020450416552.

It is a happy number.

It is a super-2 number, since 2×2556140540206² (a number of 26 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 726793960 + ... + 726797476.

It is an arithmetic number, because the mean of its divisors is an integer number (67047767820).

Almost surely, 2^{2556140540206} is an apocalyptic number.

2556140540206 is a deficient number, since it is larger than the sum of its proper divisors (1734916600274).

2556140540206 is a wasteful number, since it uses less digits than its factorization.

2556140540206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5329.

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 2556140540206 its reverse (6020450416552), we get a palindrome (8576590956758).

The spelling of 2556140540206 in words is "two trillion, five hundred fifty-six billion, one hundred forty million, five hundred forty thousand, two hundred six".