76851391850 has 12 divisors (see below), whose sum is σ = 142943588934. Its totient is φ = 30740556720.

The previous prime is 76851391811. The next prime is 76851391879. The reversal of 76851391850 is 5819315867.

It can be written as a sum of positive squares in 3 ways, for example, as 53616791809 + 23234600041 = 231553^2 + 152429^2 .

It is a super-2 number, since 2×76851391850² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 76851391792 and 76851391801.

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 5 ways as a sum of consecutive naturals, for example, 768513869 + ... + 768513968.

Almost surely, 2^76851391850 is an apocalyptic number.

76851391850 is a deficient number, since it is larger than the sum of its proper divisors (66092197084).

76851391850 is a wasteful number, since it uses less digits than its factorization.

76851391850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537027849 (or 1537027844 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 53.

The spelling of 76851391850 in words is "seventy-six billion, eight hundred fifty-one million, three hundred ninety-one thousand, eight hundred fifty".