51986588398 has 4 divisors (see below), whose sum is σ = 77979882600. Its totient is φ = 25993294198.

The previous prime is 51986588383. The next prime is 51986588429. The reversal of 51986588398 is 89388568915.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12996647098 + ... + 12996647101.

It is an arithmetic number, because the mean of its divisors is an integer number (19494970650).

Almost surely, 2^51986588398 is an apocalyptic number.

51986588398 is a deficient number, since it is larger than the sum of its proper divisors (25993294202).

51986588398 is a wasteful number, since it uses less digits than its factorization.

51986588398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25993294201.

The product of its digits is 149299200, while the sum is 70.

The spelling of 51986588398 in words is "fifty-one billion, nine hundred eighty-six million, five hundred eighty-eight thousand, three hundred ninety-eight".