2556555604 has 6 divisors (see below), whose sum is σ = 4473972314. Its totient is φ = 1278277800.

The previous prime is 2556555569. The next prime is 2556555607. The reversal of 2556555604 is 4065556552.

It can be written as a sum of positive squares in only one way, i.e., 2329992900 + 226562704 = 48270^2 + 15052^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556555607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319569447 + ... + 319569454.

Almost surely, 2^2556555604 is an apocalyptic number.

It is an amenable number.

2556555604 is a deficient number, since it is larger than the sum of its proper divisors (1917416710).

2556555604 is a wasteful number, since it uses less digits than its factorization.

2556555604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639138905 (or 639138903 counting only the distinct ones).

The product of its (nonzero) digits is 900000, while the sum is 43.

The square root of 2556555604 is about 50562.3931791208. The cubic root of 2556555604 is about 1367.3669575691.

The spelling of 2556555604 in words is "two billion, five hundred fifty-six million, five hundred fifty-five thousand, six hundred four".