55213634461 has 4 divisors (see below), whose sum is σ = 55969985692. Its totient is φ = 54457283232.

The previous prime is 55213634447. The next prime is 55213634479. The reversal of 55213634461 is 16443631255.

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 45490491225 + 9723143236 = 213285^2 + 98606^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55213634461 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 (55213634491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378175506 + ... + 378175651.

It is an arithmetic number, because the mean of its divisors is an integer number (13992496423).

Almost surely, 2^55213634461 is an apocalyptic number.

It is an amenable number.

55213634461 is a deficient number, since it is larger than the sum of its proper divisors (756351231).

55213634461 is an equidigital number, since it uses as much as digits as its factorization.

55213634461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756351230.

The product of its digits is 259200, while the sum is 40.

The spelling of 55213634461 in words is "fifty-five billion, two hundred thirteen million, six hundred thirty-four thousand, four hundred sixty-one".