2556621434 has 16 divisors (see below), whose sum is σ = 3888241728. Its totient is φ = 1260634752.

The previous prime is 2556621427. The next prime is 2556621439. The reversal of 2556621434 is 4341266552.

2556621434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2556621439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31619 + ... + 78185.

It is an arithmetic number, because the mean of its divisors is an integer number (243015108).

Almost surely, 2^2556621434 is an apocalyptic number.

2556621434 is a deficient number, since it is larger than the sum of its proper divisors (1331620294).

2556621434 is a wasteful number, since it uses less digits than its factorization.

2556621434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46949.

The product of its digits is 172800, while the sum is 38.

The square root of 2556621434 is about 50563.0441528198. The cubic root of 2556621434 is about 1367.3786938018.

Adding to 2556621434 its reverse (4341266552), we get a palindrome (6897887986).

The spelling of 2556621434 in words is "two billion, five hundred fifty-six million, six hundred twenty-one thousand, four hundred thirty-four".