51787678 has 32 divisors (see below), whose sum is σ = 86780160. Its totient is φ = 23063040.

The previous prime is 51787669. The next prime is 51787721. The reversal of 51787678 is 87678715.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51763 + ... + 52753.

It is an arithmetic number, because the mean of its divisors is an integer number (2711880).

Almost surely, 2^51787678 is an apocalyptic number.

51787678 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

51787678 is a deficient number, since it is larger than the sum of its proper divisors (34992482).

51787678 is a wasteful number, since it uses less digits than its factorization.

51787678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092.

The product of its digits is 658560, while the sum is 49.

The square root of 51787678 is about 7196.3656105009. The cubic root of 51787678 is about 372.7424135648.

The spelling of 51787678 in words is "fifty-one million, seven hundred eighty-seven thousand, six hundred seventy-eight".