56821138850 has 96 divisors (see below), whose sum is σ = 123037660800. Its totient is φ = 19119398400.

The previous prime is 56821138837. The next prime is 56821138903. The reversal of 56821138850 is 5883112865.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56821138795 and 56821138804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14638910 + ... + 14642790.

It is an arithmetic number, because the mean of its divisors is an integer number (1281642300).

Almost surely, 2^56821138850 is an apocalyptic number.

56821138850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

56821138850 is an abundant number, since it is smaller than the sum of its proper divisors (66216521950).

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

56821138850 is a wasteful number, since it uses less digits than its factorization.

56821138850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4668 (or 4663 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 47.

The spelling of 56821138850 in words is "fifty-six billion, eight hundred twenty-one million, one hundred thirty-eight thousand, eight hundred fifty".