78608531650418 has 32 divisors (see below), whose sum is σ = 155655702096768. Its totient is φ = 28825130016000.

The previous prime is 78608531650403. The next prime is 78608531650513. The reversal of 78608531650418 is 81405613580687.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15013085933 + ... + 15013091168.

It is an arithmetic number, because the mean of its divisors is an integer number (4864240690524).

Almost surely, 2^{78608531650418} is an apocalyptic number.

78608531650418 is a deficient number, since it is larger than the sum of its proper divisors (77047170446350).

78608531650418 is a wasteful number, since it uses less digits than its factorization.

78608531650418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30026177138.

The product of its (nonzero) digits is 38707200, while the sum is 62.

The spelling of 78608531650418 in words is "seventy-eight trillion, six hundred eight billion, five hundred thirty-one million, six hundred fifty thousand, four hundred eighteen".