51853766136 has 32 divisors (see below), whose sum is σ = 131569261440. Its totient is φ = 17026609248.

The previous prime is 51853766131. The next prime is 51853766207. The reversal of 51853766136 is 63166735815.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51853766131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16122076 + ... + 16125291.

It is an arithmetic number, because the mean of its divisors is an integer number (4111539420).

Almost surely, 2^51853766136 is an apocalyptic number.

It is an amenable number.

51853766136 is an abundant number, since it is smaller than the sum of its proper divisors (79715495304).

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

51853766136 is a wasteful number, since it uses less digits than its factorization.

51853766136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32247443 (or 32247439 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 51.

The spelling of 51853766136 in words is "fifty-one billion, eight hundred fifty-three million, seven hundred sixty-six thousand, one hundred thirty-six".