77393582450 has 18 divisors (see below), whose sum is σ = 143955722349. Its totient is φ = 30956646120.

The previous prime is 77393582423. The next prime is 77393582459. The reversal of 77393582450 is 5428539377.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75845710801 + 1547871649 = 275401^2 + 39343^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=196715.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77393582392 and 77393582401.

It is not an unprimeable number, because it can be changed into a prime (77393582459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1947479 + ... + 1986821.

Almost surely, 2^77393582450 is an apocalyptic number.

77393582450 is a deficient number, since it is larger than the sum of its proper divisors (66562139899).

77393582450 is an frugal number, since it uses more digits than its factorization.

77393582450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78698 (or 39350 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 53.

The spelling of 77393582450 in words is "seventy-seven billion, three hundred ninety-three million, five hundred eighty-two thousand, four hundred fifty".