2556637630 has 8 divisors (see below), whose sum is σ = 4601947752. Its totient is φ = 1022655048.

The previous prime is 2556637621. The next prime is 2556637637. The reversal of 2556637630 is 367366552.

2556637630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2556637630² = 13072791942264033800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556637637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127831872 + ... + 127831891.

It is an arithmetic number, because the mean of its divisors is an integer number (575243469).

Almost surely, 2^2556637630 is an apocalyptic number.

2556637630 is a deficient number, since it is larger than the sum of its proper divisors (2045310122).

2556637630 is a wasteful number, since it uses less digits than its factorization.

2556637630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255663770.

The product of its (nonzero) digits is 680400, while the sum is 43.

The square root of 2556637630 is about 50563.2043090625. The cubic root of 2556637630 is about 1367.3815812086.

The spelling of 2556637630 in words is "two billion, five hundred fifty-six million, six hundred thirty-seven thousand, six hundred thirty".