55905738623 has 4 divisors (see below), whose sum is σ = 63892272720. Its totient is φ = 47919204528.

The previous prime is 55905738619. The next prime is 55905738631. The reversal of 55905738623 is 32683750955.

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

It is a cyclic number.

It is not a de Polignac number, because 55905738623 - 2² = 55905738619 is a prime.

It is a super-2 number, since 2×55905738623² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55905738683) 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, 3993267038 + ... + 3993267051.

It is an arithmetic number, because the mean of its divisors is an integer number (15973068180).

Almost surely, 2^55905738623 is an apocalyptic number.

55905738623 is a deficient number, since it is larger than the sum of its proper divisors (7986534097).

55905738623 is an equidigital number, since it uses as much as digits as its factorization.

55905738623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7986534096.

The product of its (nonzero) digits is 6804000, while the sum is 53.

The spelling of 55905738623 in words is "fifty-five billion, nine hundred five million, seven hundred thirty-eight thousand, six hundred twenty-three".