55724968217 has 16 divisors (see below), whose sum is σ = 56705904000. Its totient is φ = 54750390912.

The previous prime is 55724968207. The next prime is 55724968231. The reversal of 55724968217 is 71286942755.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55724968217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55724968207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26699948 + ... + 26702034.

It is an arithmetic number, because the mean of its divisors is an integer number (3544119000).

Almost surely, 2^55724968217 is an apocalyptic number.

It is an amenable number.

55724968217 is a deficient number, since it is larger than the sum of its proper divisors (980935783).

55724968217 is a wasteful number, since it uses less digits than its factorization.

55724968217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3392.

The product of its digits is 8467200, while the sum is 56.

The spelling of 55724968217 in words is "fifty-five billion, seven hundred twenty-four million, nine hundred sixty-eight thousand, two hundred seventeen".