2556803467138 has 8 divisors (see below), whose sum is σ = 3958921497600. Its totient is φ = 1237162967940.

The previous prime is 2556803467073. The next prime is 2556803467139. The reversal of 2556803467138 is 8317643086552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2556803467138² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2556803467139) 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, 20619382738 + ... + 20619382861.

It is an arithmetic number, because the mean of its divisors is an integer number (494865187200).

Almost surely, 2^{2556803467138} is an apocalyptic number.

2556803467138 is a deficient number, since it is larger than the sum of its proper divisors (1402118030462).

2556803467138 is a wasteful number, since it uses less digits than its factorization.

2556803467138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41238765632.

The product of its (nonzero) digits is 29030400, while the sum is 58.

The spelling of 2556803467138 in words is "two trillion, five hundred fifty-six billion, eight hundred three million, four hundred sixty-seven thousand, one hundred thirty-eight".