56241378905 has 4 divisors (see below), whose sum is σ = 67489654692. Its totient is φ = 44993103120.

The previous prime is 56241378857. The next prime is 56241378911. The reversal of 56241378905 is 50987314265.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41056485376 + 15184893529 = 202624^2 + 123227^2 .

It is not a de Polignac number, because 56241378905 - 2¹⁴ = 56241362521 is a prime.

It is a super-2 number, since 2×56241378905² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 5624137886 + ... + 5624137895.

It is an arithmetic number, because the mean of its divisors is an integer number (16872413673).

It is a 1-persistent number, because it is pandigital, but 2⋅56241378905 = 112482757810 is not.

Almost surely, 2^56241378905 is an apocalyptic number.

It is an amenable number.

56241378905 is a deficient number, since it is larger than the sum of its proper divisors (11248275787).

56241378905 is a wasteful number, since it uses less digits than its factorization.

56241378905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11248275786.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 56241378905 in words is "fifty-six billion, two hundred forty-one million, three hundred seventy-eight thousand, nine hundred five".