78454768905 has 12 divisors (see below), whose sum is σ = 135988266180. Its totient is φ = 41842543392.

The previous prime is 78454768891. The next prime is 78454768913. The reversal of 78454768905 is 50986745487.

78454768905 is a `hidden beast` number, since 7 + 8 + 4 + 547 + 6 + 89 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26383180041 + 52071588864 = 162429^2 + 228192^2 .

It is not a de Polignac number, because 78454768905 - 2⁶ = 78454768841 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 871719610 + ... + 871719699.

It is an arithmetic number, because the mean of its divisors is an integer number (11332355515).

Almost surely, 2^78454768905 is an apocalyptic number.

It is an amenable number.

78454768905 is a deficient number, since it is larger than the sum of its proper divisors (57533497275).

78454768905 is a wasteful number, since it uses less digits than its factorization.

78454768905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743439320 (or 1743439317 counting only the distinct ones).

The product of its (nonzero) digits is 67737600, while the sum is 63.

The spelling of 78454768905 in words is "seventy-eight billion, four hundred fifty-four million, seven hundred sixty-eight thousand, nine hundred five".