51612678 has 48 divisors (see below), whose sum is σ = 120958656. Its totient is φ = 15811200.

The previous prime is 51612661. The next prime is 51612689. The reversal of 51612678 is 87621615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85578 + ... + 86178.

It is an arithmetic number, because the mean of its divisors is an integer number (2519972).

Almost surely, 2^51612678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51612678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60479328).

51612678 is an abundant number, since it is smaller than the sum of its proper divisors (69345978).

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

51612678 is a wasteful number, since it uses less digits than its factorization.

51612678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989 (or 986 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 51612678 is about 7184.1964060012. The cubic root of 51612678 is about 372.3220849092.

The spelling of 51612678 in words is "fifty-one million, six hundred twelve thousand, six hundred seventy-eight".