256612223450 has 48 divisors (see below), whose sum is σ = 523699490016. Its totient is φ = 92774116800.

The previous prime is 256612223431. The next prime is 256612223459. The reversal of 256612223450 is 54322216652.

It is not an unprimeable number, because it can be changed into a prime (256612223459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1253312 + ... + 1443611.

It is an arithmetic number, because the mean of its divisors is an integer number (10910406042).

Almost surely, 2^256612223450 is an apocalyptic number.

256612223450 is an abundant number, since it is smaller than the sum of its proper divisors (267087266566).

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

256612223450 is a wasteful number, since it uses less digits than its factorization.

256612223450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697119 (or 2697114 counting only the distinct ones).

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

The spelling of 256612223450 in words is "two hundred fifty-six billion, six hundred twelve million, two hundred twenty-three thousand, four hundred fifty".