51563205552535 has 4 divisors (see below), whose sum is σ = 61875846663048. Its totient is φ = 41250564442024.

The previous prime is 51563205552451. The next prime is 51563205552539. The reversal of 51563205552535 is 53525550236515.

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 51563205552535 - 2¹³ = 51563205544343 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 (51563205552539) 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, 5156320555249 + ... + 5156320555258.

It is an arithmetic number, because the mean of its divisors is an integer number (15468961665762).

Almost surely, 2^{51563205552535} is an apocalyptic number.

51563205552535 is a deficient number, since it is larger than the sum of its proper divisors (10312641110513).

51563205552535 is a wasteful number, since it uses less digits than its factorization.

51563205552535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10312641110512.

The product of its (nonzero) digits is 16875000, while the sum is 52.

The spelling of 51563205552535 in words is "fifty-one trillion, five hundred sixty-three billion, two hundred five million, five hundred fifty-two thousand, five hundred thirty-five".