51386861422 has 8 divisors (see below), whose sum is σ = 83009545416. Its totient is φ = 23717012952.

The previous prime is 51386861417. The next prime is 51386861423. The reversal of 51386861422 is 22416868315.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51386861423) 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 3 ways as a sum of consecutive naturals, for example, 988208848 + ... + 988208899.

It is an arithmetic number, because the mean of its divisors is an integer number (10376193177).

Almost surely, 2^51386861422 is an apocalyptic number.

51386861422 is a deficient number, since it is larger than the sum of its proper divisors (31622683994).

51386861422 is a wasteful number, since it uses less digits than its factorization.

51386861422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976417762.

The product of its digits is 552960, while the sum is 46.

The spelling of 51386861422 in words is "fifty-one billion, three hundred eighty-six million, eight hundred sixty-one thousand, four hundred twenty-two".