51871480138 has 32 divisors (see below), whose sum is σ = 82171080000. Its totient is φ = 24490221696.

The previous prime is 51871480093. The next prime is 51871480147. The reversal of 51871480138 is 83108417815.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22620520 + ... + 22622812.

It is an arithmetic number, because the mean of its divisors is an integer number (2567846250).

Almost surely, 2^51871480138 is an apocalyptic number.

51871480138 is a deficient number, since it is larger than the sum of its proper divisors (30299599862).

51871480138 is a wasteful number, since it uses less digits than its factorization.

51871480138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006.

The product of its (nonzero) digits is 215040, while the sum is 46.

The spelling of 51871480138 in words is "fifty-one billion, eight hundred seventy-one million, four hundred eighty thousand, one hundred thirty-eight".