78090618600 has 144 divisors (see below), whose sum is σ = 277681161420. Its totient is φ = 19599206400.

The previous prime is 78090618587. The next prime is 78090618611. The reversal of 78090618600 is 681609087.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 51871884516 + 26218734084 = 227754^2 + 161922^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1245391 + ... + 1306590.

Almost surely, 2^78090618600 is an apocalyptic number.

It is an amenable number.

78090618600 is an abundant number, since it is smaller than the sum of its proper divisors (199590542820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78090618600 is a wasteful number, since it uses less digits than its factorization.

78090618600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552020 (or 2552008 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 78090618600 in words is "seventy-eight billion, ninety million, six hundred eighteen thousand, six hundred".