51381779233 has 8 divisors (see below), whose sum is σ = 51428235168. Its totient is φ = 51335348064.

The previous prime is 51381779153. The next prime is 51381779261. The reversal of 51381779233 is 33297718315.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51381779233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51381777233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8123010 + ... + 8129332.

It is an arithmetic number, because the mean of its divisors is an integer number (6428529396).

Almost surely, 2^51381779233 is an apocalyptic number.

It is an amenable number.

51381779233 is a deficient number, since it is larger than the sum of its proper divisors (46455935).

51381779233 is a wasteful number, since it uses less digits than its factorization.

51381779233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12383.

The product of its digits is 952560, while the sum is 49.

The spelling of 51381779233 in words is "fifty-one billion, three hundred eighty-one million, seven hundred seventy-nine thousand, two hundred thirty-three".