2256404243646 has 32 divisors (see below), whose sum is σ = 5323866236928. Its totient is φ = 623890573920.

The previous prime is 2256404243609. The next prime is 2256404243701. The reversal of 2256404243646 is 6463424046522.

It is a super-2 number, since 2×2256404243646² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2256404243595 and 2256404243604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 866513385 + ... + 866515988.

It is an arithmetic number, because the mean of its divisors is an integer number (166370819904).

Almost surely, 2^{2256404243646} is an apocalyptic number.

2256404243646 is an abundant number, since it is smaller than the sum of its proper divisors (3067461993282).

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

2256404243646 is a wasteful number, since it uses less digits than its factorization.

2256404243646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733029416.

The product of its (nonzero) digits is 6635520, while the sum is 48.

The spelling of 2256404243646 in words is "two trillion, two hundred fifty-six billion, four hundred four million, two hundred forty-three thousand, six hundred forty-six".