78334747450 has 12 divisors (see below), whose sum is σ = 145702630350. Its totient is φ = 31333898960.

The previous prime is 78334747433. The next prime is 78334747483. The reversal of 78334747450 is 5474743387.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 75529879929 + 2804867521 = 274827^2 + 52961^2 .

It is a super-2 number, since 2×78334747450² (a number of 23 digits) contains 22 as substring.

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, 783347425 + ... + 783347524.

Almost surely, 2^78334747450 is an apocalyptic number.

78334747450 is a deficient number, since it is larger than the sum of its proper divisors (67367882900).

78334747450 is a wasteful number, since it uses less digits than its factorization.

78334747450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566694961 (or 1566694956 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 52.

The spelling of 78334747450 in words is "seventy-eight billion, three hundred thirty-four million, seven hundred forty-seven thousand, four hundred fifty".