51618546 has 48 divisors (see below), whose sum is σ = 132560064. Its totient is φ = 14747184.

The previous prime is 51618527. The next prime is 51618551. The reversal of 51618546 is 64581615.

51618546 is a `hidden beast` number, since 51 + 61 + 8 + 546 = 666.

51618546 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51618546.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4185 + ... + 10988.

It is an arithmetic number, because the mean of its divisors is an integer number (2761668).

Almost surely, 2^51618546 is an apocalyptic number.

51618546 is an abundant number, since it is smaller than the sum of its proper divisors (80941518).

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

51618546 is a wasteful number, since it uses less digits than its factorization.

51618546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15197 (or 15185 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 51618546 is about 7184.6047908010. The cubic root of 51618546 is about 372.3361945122.

The spelling of 51618546 in words is "fifty-one million, six hundred eighteen thousand, five hundred forty-six".