5211503655663 has 4 divisors (see below), whose sum is σ = 6948671540888. Its totient is φ = 3474335770440.

The previous prime is 5211503655647. The next prime is 5211503655671. The reversal of 5211503655663 is 3665563051125.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 5211503655663 - 2⁴ = 5211503655647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5211503655623) 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, 868583942608 + ... + 868583942613.

It is an arithmetic number, because the mean of its divisors is an integer number (1737167885222).

Almost surely, 2^{5211503655663} is an apocalyptic number.

5211503655663 is a deficient number, since it is larger than the sum of its proper divisors (1737167885225).

5211503655663 is a wasteful number, since it uses less digits than its factorization.

5211503655663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737167885224.

The product of its (nonzero) digits is 2430000, while the sum is 48.

The spelling of 5211503655663 in words is "five trillion, two hundred eleven billion, five hundred three million, six hundred fifty-five thousand, six hundred sixty-three".