51618744 has 96 divisors (see below), whose sum is σ = 149058000. Its totient is φ = 16091136.

The previous prime is 51618731. The next prime is 51618757. The reversal of 51618744 is 44781615.

It is a happy number.

51618744 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51618731) and next prime (51618757).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 51618699 and 51618708.

It is a congruent number.

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, 132502 + ... + 132890.

Almost surely, 2^51618744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51618744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74529000).

51618744 is an abundant number, since it is smaller than the sum of its proper divisors (97439256).

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

51618744 is a wasteful number, since it uses less digits than its factorization.

51618744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517 (or 510 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 51618744 is about 7184.6185702513. The cubic root of 51618744 is about 372.3366705845.

The spelling of 51618744 in words is "fifty-one million, six hundred eighteen thousand, seven hundred forty-four".