56531850905 has 4 divisors (see below), whose sum is σ = 67838221092. Its totient is φ = 45225480720.

The previous prime is 56531850889. The next prime is 56531850911. The reversal of 56531850905 is 50905813565.

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 22580471824 + 33951379081 = 150268^2 + 184259^2 .

It is not a de Polignac number, because 56531850905 - 2⁴ = 56531850889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56531850905.

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, 5653185086 + ... + 5653185095.

It is an arithmetic number, because the mean of its divisors is an integer number (16959555273).

Almost surely, 2^56531850905 is an apocalyptic number.

It is an amenable number.

56531850905 is a deficient number, since it is larger than the sum of its proper divisors (11306370187).

56531850905 is a wasteful number, since it uses less digits than its factorization.

56531850905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11306370186.

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 56531850905 in words is "fifty-six billion, five hundred thirty-one million, eight hundred fifty thousand, nine hundred five".