55107616591 has 4 divisors (see below), whose sum is σ = 56597011672. Its totient is φ = 53618221512.

The previous prime is 55107616579. The next prime is 55107616601. The reversal of 55107616591 is 19561670155.

It is a happy number.

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 55107616591 - 2⁷ = 55107616463 is a prime.

It is a super-2 number, since 2×55107616591² (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 (55107619591) 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, 744697485 + ... + 744697558.

It is an arithmetic number, because the mean of its divisors is an integer number (14149252918).

Almost surely, 2^55107616591 is an apocalyptic number.

55107616591 is a deficient number, since it is larger than the sum of its proper divisors (1489395081).

55107616591 is a wasteful number, since it uses less digits than its factorization.

55107616591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489395080.

The product of its (nonzero) digits is 283500, while the sum is 46.

The spelling of 55107616591 in words is "fifty-five billion, one hundred seven million, six hundred sixteen thousand, five hundred ninety-one".