2556123635452 has 12 divisors (see below), whose sum is σ = 4473243149536. Its totient is φ = 1278054164160.

The previous prime is 2556123635449. The next prime is 2556123635459. The reversal of 2556123635452 is 2545363216552.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2556123635396 and 2556123635405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556123635459) 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, 1125933 + ... + 2525860.

Almost surely, 2^{2556123635452} is an apocalyptic number.

It is an amenable number.

2556123635452 is a deficient number, since it is larger than the sum of its proper divisors (1917119514084).

2556123635452 is a wasteful number, since it uses less digits than its factorization.

2556123635452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3826788 (or 3826786 counting only the distinct ones).

The product of its digits is 6480000, while the sum is 49.

The spelling of 2556123635452 in words is "two trillion, five hundred fifty-six billion, one hundred twenty-three million, six hundred thirty-five thousand, four hundred fifty-two".