51008778 has 40 divisors (see below), whose sum is σ = 114708000. Its totient is φ = 16941960.

The previous prime is 51008777. The next prime is 51008791. The reversal of 51008778 is 87780015.

It is not an unprimeable number, because it can be changed into a prime (51008777) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 80523 + ... + 81153.

It is an arithmetic number, because the mean of its divisors is an integer number (2867700).

Almost surely, 2^51008778 is an apocalyptic number.

51008778 is an abundant number, since it is smaller than the sum of its proper divisors (63699222).

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

51008778 is a wasteful number, since it uses less digits than its factorization.

51008778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 36.

The square root of 51008778 is about 7142.0429850289. The cubic root of 51008778 is about 370.8642519129.

The spelling of 51008778 in words is "fifty-one million, eight thousand, seven hundred seventy-eight".