55775450457047 has 4 divisors (see below), whose sum is σ = 58200470042160. Its totient is φ = 53350430871936.

The previous prime is 55775450456993. The next prime is 55775450457049. The reversal of 55775450457047 is 74075405457755.

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 55775450457047 - 2⁶ = 55775450456983 is a prime.

It is a super-2 number, since 2×55775450457047² (a number of 28 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 (55775450457049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1212509792522 + ... + 1212509792567.

It is an arithmetic number, because the mean of its divisors is an integer number (14550117510540).

Almost surely, 2^{55775450457047} is an apocalyptic number.

55775450457047 is a deficient number, since it is larger than the sum of its proper divisors (2425019585113).

55775450457047 is a wasteful number, since it uses less digits than its factorization.

55775450457047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425019585112.

The product of its (nonzero) digits is 480200000, while the sum is 65.

The spelling of 55775450457047 in words is "fifty-five trillion, seven hundred seventy-five billion, four hundred fifty million, four hundred fifty-seven thousand, forty-seven".