51002042080 has 72 divisors (see below), whose sum is σ = 132442026696. Its totient is φ = 18546190080.

The previous prime is 51002042041. The next prime is 51002042083. The reversal of 51002042080 is 8024020015.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51002042083) 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 11 ways as a sum of consecutive naturals, for example, 1297842 + ... + 1336561.

It is an arithmetic number, because the mean of its divisors is an integer number (1839472593).

Almost surely, 2^51002042080 is an apocalyptic number.

It is an amenable number.

51002042080 is an abundant number, since it is smaller than the sum of its proper divisors (81439984616).

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

51002042080 is a wasteful number, since it uses less digits than its factorization.

51002042080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634440 (or 2634421 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 51002042080 its reverse (8024020015), we get a palindrome (59026062095).

The spelling of 51002042080 in words is "fifty-one billion, two million, forty-two thousand, eighty".