78473592618 has 16 divisors (see below), whose sum is σ = 159520090656. Its totient is φ = 25729046640.

The previous prime is 78473592553. The next prime is 78473592671. The reversal of 78473592618 is 81629537487.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107203996 + ... + 107204727.

It is an arithmetic number, because the mean of its divisors is an integer number (9970005666).

Almost surely, 2^78473592618 is an apocalyptic number.

78473592618 is an abundant number, since it is smaller than the sum of its proper divisors (81046498038).

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

78473592618 is a wasteful number, since it uses less digits than its factorization.

78473592618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214408789.

The product of its digits is 20321280, while the sum is 60.

The spelling of 78473592618 in words is "seventy-eight billion, four hundred seventy-three million, five hundred ninety-two thousand, six hundred eighteen".