51189012549 has 12 divisors (see below), whose sum is σ = 74200959456. Its totient is φ = 34005420072.

The previous prime is 51189012529. The next prime is 51189012629. The reversal of 51189012549 is 94521098115.

51189012549 is a `hidden beast` number, since 5 + 1 + 1 + 8 + 90 + 12 + 549 = 666.

51189012549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51189012549 - 2⁵ = 51189012517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51189012529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10046337 + ... + 10051430.

It is an arithmetic number, because the mean of its divisors is an integer number (6183413288).

Almost surely, 2^51189012549 is an apocalyptic number.

It is an amenable number.

51189012549 is a deficient number, since it is larger than the sum of its proper divisors (23011946907).

51189012549 is a wasteful number, since it uses less digits than its factorization.

51189012549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20098056 (or 20098053 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The spelling of 51189012549 in words is "fifty-one billion, one hundred eighty-nine million, twelve thousand, five hundred forty-nine".