78611880957717 has 8 divisors (see below), whose sum is σ = 104822670176800. Its totient is φ = 52404506188560.

The previous prime is 78611880957703. The next prime is 78611880957769. The reversal of 78611880957717 is 71775908811687.

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

It is not a de Polignac number, because 78611880957717 - 2⁸ = 78611880957461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78611880957017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 853558759 + ... + 853650852.

It is an arithmetic number, because the mean of its divisors is an integer number (13102833772100).

Almost surely, 2^{78611880957717} is an apocalyptic number.

It is an amenable number.

78611880957717 is a deficient number, since it is larger than the sum of its proper divisors (26210789219083).

78611880957717 is a wasteful number, since it uses less digits than its factorization.

78611880957717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707224963.

The product of its (nonzero) digits is 331914240, while the sum is 75.

The spelling of 78611880957717 in words is "seventy-eight trillion, six hundred eleven billion, eight hundred eighty million, nine hundred fifty-seven thousand, seven hundred seventeen".