55168945649 has 16 divisors (see below), whose sum is σ = 59055530688. Its totient is φ = 51354335232.

The previous prime is 55168945631. The next prime is 55168945723. The reversal of 55168945649 is 94654986155.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55168945649 is a prime.

It is a super-2 number, since 2×55168945649² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55168945591 and 55168945600.

It is not an unprimeable number, because it can be changed into a prime (55168945049) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2672642 + ... + 2693204.

It is an arithmetic number, because the mean of its divisors is an integer number (3690970668).

Almost surely, 2^55168945649 is an apocalyptic number.

It is an amenable number.

55168945649 is a deficient number, since it is larger than the sum of its proper divisors (3886585039).

55168945649 is a wasteful number, since it uses less digits than its factorization.

55168945649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22304.

The product of its digits is 46656000, while the sum is 62.

The spelling of 55168945649 in words is "fifty-five billion, one hundred sixty-eight million, nine hundred forty-five thousand, six hundred forty-nine".