2256475640 has 32 divisors (see below), whose sum is σ = 5185097280. Its totient is φ = 883385472.

The previous prime is 2256475633. The next prime is 2256475649. The reversal of 2256475640 is 465746522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256475649) 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, 598247 + ... + 602006.

It is an arithmetic number, because the mean of its divisors is an integer number (162034290).

Almost surely, 2^2256475640 is an apocalyptic number.

2256475640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2256475640 is an abundant number, since it is smaller than the sum of its proper divisors (2928621640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2256475640 is a wasteful number, since it uses less digits than its factorization.

2256475640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200311 (or 1200307 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 41.

The square root of 2256475640 is about 47502.3750985148. The cubic root of 2256475640 is about 1311.6266024828.

The spelling of 2256475640 in words is "two billion, two hundred fifty-six million, four hundred seventy-five thousand, six hundred forty".