2556636485 has 32 divisors (see below), whose sum is σ = 3484978560. Its totient is φ = 1784947968.

The previous prime is 2556636463. The next prime is 2556636521. The reversal of 2556636485 is 5846366552.

It is a cyclic number.

It is not a de Polignac number, because 2556636485 - 2¹⁰ = 2556635461 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 693467 + ... + 697143.

It is an arithmetic number, because the mean of its divisors is an integer number (108905580).

Almost surely, 2^2556636485 is an apocalyptic number.

It is an amenable number.

2556636485 is a deficient number, since it is larger than the sum of its proper divisors (928342075).

2556636485 is a wasteful number, since it uses less digits than its factorization.

2556636485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277.

The product of its digits is 5184000, while the sum is 50.

The square root of 2556636485 is about 50563.1929865985. The cubic root of 2556636485 is about 1367.3813770796.

The spelling of 2556636485 in words is "two billion, five hundred fifty-six million, six hundred thirty-six thousand, four hundred eighty-five".