77713427450 has 24 divisors (see below), whose sum is σ = 148072514940. Its totient is φ = 30327190400.

The previous prime is 77713427447. The next prime is 77713427459. The reversal of 77713427450 is 5472431777.

It can be written as a sum of positive squares in 6 ways, for example, as 34444019281 + 43269408169 = 185591^2 + 208013^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 77713427395 and 77713427404.

It is not an unprimeable number, because it can be changed into a prime (77713427459) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 18952445 + ... + 18956544.

Almost surely, 2^77713427450 is an apocalyptic number.

77713427450 is a deficient number, since it is larger than the sum of its proper divisors (70359087490).

77713427450 is a wasteful number, since it uses less digits than its factorization.

77713427450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37909042 (or 37909037 counting only the distinct ones).

The product of its (nonzero) digits is 1152480, while the sum is 47.

The spelling of 77713427450 in words is "seventy-seven billion, seven hundred thirteen million, four hundred twenty-seven thousand, four hundred fifty".