78611668045 has 8 divisors (see below), whose sum is σ = 95626248696. Its totient is φ = 62027836416.

The previous prime is 78611668033. The next prime is 78611668063. The reversal of 78611668045 is 54086611687.

It can be written as a sum of positive squares in 4 ways, for example, as 6645021289 + 71966646756 = 81517^2 + 268266^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78611668045 - 2⁷ = 78611667917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78611667983 and 78611668001.

It is a congruent number.

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, 107686852 + ... + 107687581.

It is an arithmetic number, because the mean of its divisors is an integer number (11953281087).

Almost surely, 2^78611668045 is an apocalyptic number.

It is an amenable number.

78611668045 is a deficient number, since it is larger than the sum of its proper divisors (17014580651).

78611668045 is a wasteful number, since it uses less digits than its factorization.

78611668045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215374511.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 78611668045 in words is "seventy-eight billion, six hundred eleven million, six hundred sixty-eight thousand, forty-five".