1012256450838 has 24 divisors (see below), whose sum is σ = 2263971418176. Its totient is φ = 326534338800.

The previous prime is 1012256450831. The next prime is 1012256450873. The reversal of 1012256450838 is 8380546522101.

1012256450838 is a `hidden beast` number, since 1 + 0 + 1 + 2 + 2 + 564 + 5 + 0 + 83 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1012256450793 and 1012256450802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012256450831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 907039273 + ... + 907040388.

It is an arithmetic number, because the mean of its divisors is an integer number (94332142424).

Almost surely, 2^{1012256450838} is an apocalyptic number.

1012256450838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1012256450838 is an abundant number, since it is smaller than the sum of its proper divisors (1251714967338).

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

1012256450838 is a wasteful number, since it uses less digits than its factorization.

1012256450838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814079700 (or 1814079697 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 1012256450838 in words is "one trillion, twelve billion, two hundred fifty-six million, four hundred fifty thousand, eight hundred thirty-eight".