51612644 has 24 divisors (see below), whose sum is σ = 97294848. Its totient is φ = 23886720.

The previous prime is 51612623. The next prime is 51612653. The reversal of 51612644 is 44621615.

51612644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 6197 + ... + 11900.

It is an arithmetic number, because the mean of its divisors is an integer number (4053952).

Almost surely, 2^51612644 is an apocalyptic number.

It is an amenable number.

51612644 is a deficient number, since it is larger than the sum of its proper divisors (45682204).

51612644 is a wasteful number, since it uses less digits than its factorization.

51612644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18155 (or 18153 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 51612644 is about 7184.1940396958. The cubic root of 51612644 is about 372.3220031531.

The spelling of 51612644 in words is "fifty-one million, six hundred twelve thousand, six hundred forty-four".