56148511109 has 4 divisors (see below), whose sum is σ = 56154725100. Its totient is φ = 56142297120.

The previous prime is 56148511087. The next prime is 56148511117. The reversal of 56148511109 is 90111584165.

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 22463414884 + 33685096225 = 149878^2 + 183535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56148511109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56148511169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3093422 + ... + 3111519.

It is an arithmetic number, because the mean of its divisors is an integer number (14038681275).

Almost surely, 2^56148511109 is an apocalyptic number.

It is an amenable number.

56148511109 is a deficient number, since it is larger than the sum of its proper divisors (6213991).

56148511109 is an equidigital number, since it uses as much as digits as its factorization.

56148511109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6213990.

The product of its (nonzero) digits is 43200, while the sum is 41.

The spelling of 56148511109 in words is "fifty-six billion, one hundred forty-eight million, five hundred eleven thousand, one hundred nine".