2556640262 has 16 divisors (see below), whose sum is σ = 4184778384. Its totient is φ = 1161780000.

The previous prime is 2556640253. The next prime is 2556640297. The reversal of 2556640262 is 2620466552.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74012 + ... + 102912.

It is an arithmetic number, because the mean of its divisors is an integer number (261548649).

Almost surely, 2^2556640262 is an apocalyptic number.

2556640262 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2556640262 is a deficient number, since it is larger than the sum of its proper divisors (1628138122).

2556640262 is a wasteful number, since it uses less digits than its factorization.

2556640262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32935.

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

The square root of 2556640262 is about 50563.2303358874. The cubic root of 2556640262 is about 1367.3820504378.

The spelling of 2556640262 in words is "two billion, five hundred fifty-six million, six hundred forty thousand, two hundred sixty-two".