51055550563 has 4 divisors (see below), whose sum is σ = 51056698960. Its totient is φ = 51054402168.

The previous prime is 51055550561. The next prime is 51055550569. The reversal of 51055550563 is 36505555015.

51055550563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36505555015 = 5 ⋅7301111003.

It is a cyclic number.

It is not a de Polignac number, because 51055550563 - 2¹ = 51055550561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51055550561) 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, 504708 + ... + 597361.

It is an arithmetic number, because the mean of its divisors is an integer number (12764174740).

Almost surely, 2^51055550563 is an apocalyptic number.

51055550563 is a deficient number, since it is larger than the sum of its proper divisors (1148397).

51055550563 is a wasteful number, since it uses less digits than its factorization.

51055550563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148396.

The product of its (nonzero) digits is 281250, while the sum is 40.

The spelling of 51055550563 in words is "fifty-one billion, fifty-five million, five hundred fifty thousand, five hundred sixty-three".