2540203012556 has 12 divisors (see below), whose sum is σ = 4849478478600. Its totient is φ = 1154637732960.

The previous prime is 2540203012511. The next prime is 2540203012579. The reversal of 2540203012556 is 6552103020452.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28865943281 + ... + 28865943368.

It is an arithmetic number, because the mean of its divisors is an integer number (404123206550).

Almost surely, 2^{2540203012556} is an apocalyptic number.

It is an amenable number.

2540203012556 is a deficient number, since it is larger than the sum of its proper divisors (2309275466044).

2540203012556 is a wasteful number, since it uses less digits than its factorization.

2540203012556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57731886664 (or 57731886662 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 2540203012556 in words is "two trillion, five hundred forty billion, two hundred three million, twelve thousand, five hundred fifty-six".