51853434885 has 48 divisors (see below), whose sum is σ = 104815526400. Its totient is φ = 23704420320.

The previous prime is 51853434863. The next prime is 51853434889. The reversal of 51853434885 is 58843435815.

51853434885 is a `hidden beast` number, since 5 + 185 + 343 + 48 + 85 = 666.

It is not a de Polignac number, because 51853434885 - 2²⁹ = 51316563973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51853434889) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1664301 + ... + 1695170.

It is an arithmetic number, because the mean of its divisors is an integer number (2183656800).

Almost surely, 2^51853434885 is an apocalyptic number.

It is an amenable number.

51853434885 is an abundant number, since it is smaller than the sum of its proper divisors (52962091515).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51853434885 is a wasteful number, since it uses less digits than its factorization.

51853434885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359503 (or 3359486 counting only the distinct ones).

The product of its digits is 9216000, while the sum is 54.

The spelling of 51853434885 in words is "fifty-one billion, eight hundred fifty-three million, four hundred thirty-four thousand, eight hundred eighty-five".