51421878089 has 8 divisors (see below), whose sum is σ = 51773711040. Its totient is φ = 51070194000.

The previous prime is 51421878083. The next prime is 51421878121. The reversal of 51421878089 is 98087812415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51421878089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51421878089.

It is not an unprimeable number, because it can be changed into a prime (51421878083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 706574 + ... + 775944.

It is an arithmetic number, because the mean of its divisors is an integer number (6471713880).

Almost surely, 2^51421878089 is an apocalyptic number.

It is an amenable number.

51421878089 is a deficient number, since it is larger than the sum of its proper divisors (351832951).

51421878089 is a wasteful number, since it uses less digits than its factorization.

51421878089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74431.

The product of its (nonzero) digits is 1290240, while the sum is 53.

The spelling of 51421878089 in words is "fifty-one billion, four hundred twenty-one million, eight hundred seventy-eight thousand, eighty-nine".