2556938942650 has 12 divisors (see below), whose sum is σ = 4755906433422. Its totient is φ = 1022775577040.

The previous prime is 2556938942617. The next prime is 2556938942659. The reversal of 2556938942650 is 562498396552.

It can be written as a sum of positive squares in 3 ways, for example, as 2458777666401 + 98161276249 = 1568049^2 + 313307^2 .

It is not an unprimeable number, because it can be changed into a prime (2556938942659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25569389377 + ... + 25569389476.

Almost surely, 2^{2556938942650} is an apocalyptic number.

2556938942650 is a deficient number, since it is larger than the sum of its proper divisors (2198967490772).

2556938942650 is a wasteful number, since it uses less digits than its factorization.

2556938942650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51138778865 (or 51138778860 counting only the distinct ones).

The product of its (nonzero) digits is 139968000, while the sum is 64.

The spelling of 2556938942650 in words is "two trillion, five hundred fifty-six billion, nine hundred thirty-eight million, nine hundred forty-two thousand, six hundred fifty".