51919237858 has 8 divisors (see below), whose sum is σ = 78309127260. Its totient is φ = 25816195440.

The previous prime is 51919237849. The next prime is 51919237859. The reversal of 51919237858 is 85873291915.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 48146452929 + 3772784929 = 219423^2 + 61423^2 .

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

It is not an unprimeable number, because it can be changed into a prime (51919237859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71711293 + ... + 71712016.

Almost surely, 2^51919237858 is an apocalyptic number.

51919237858 is a deficient number, since it is larger than the sum of its proper divisors (26389889402).

51919237858 is a wasteful number, since it uses less digits than its factorization.

51919237858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143423492.

The product of its digits is 5443200, while the sum is 58.

The spelling of 51919237858 in words is "fifty-one billion, nine hundred nineteen million, two hundred thirty-seven thousand, eight hundred fifty-eight".