55305305305257 has 16 divisors (see below), whose sum is σ = 84274865043840. Its totient is φ = 31602988814592.

The previous prime is 55305305305253. The next prime is 55305305305273. The reversal of 55305305305257 is 75250350350355.

It is a happy number.

It is not a de Polignac number, because 55305305305257 - 2² = 55305305305253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55305305305253) 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, 20676673 + ... + 23197745.

It is an arithmetic number, because the mean of its divisors is an integer number (5267179065240).

Almost surely, 2^{55305305305257} is an apocalyptic number.

It is an amenable number.

55305305305257 is a deficient number, since it is larger than the sum of its proper divisors (28969559738583).

55305305305257 is a wasteful number, since it uses less digits than its factorization.

55305305305257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3565712.

The product of its (nonzero) digits is 5906250, while the sum is 48.

The spelling of 55305305305257 in words is "fifty-five trillion, three hundred five billion, three hundred five million, three hundred five thousand, two hundred fifty-seven".