78061656105 has 48 divisors (see below), whose sum is σ = 140063489280. Its totient is φ = 40171173504.

The previous prime is 78061656097. The next prime is 78061656119. The reversal of 78061656105 is 50165616087.

78061656105 is a `hidden beast` number, since 7 + 80 + 6 + 1 + 6 + 561 + 0 + 5 = 666.

It is not a de Polignac number, because 78061656105 - 2³ = 78061656097 is a prime.

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 47 ways as a sum of consecutive naturals, for example, 2078524 + ... + 2115746.

It is an arithmetic number, because the mean of its divisors is an integer number (2917989360).

Almost surely, 2^78061656105 is an apocalyptic number.

It is an amenable number.

78061656105 is a deficient number, since it is larger than the sum of its proper divisors (62001833175).

78061656105 is a wasteful number, since it uses less digits than its factorization.

78061656105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38870 (or 38867 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 78061656105 in words is "seventy-eight billion, sixty-one million, six hundred fifty-six thousand, one hundred five".