78688411897 has 16 divisors (see below), whose sum is σ = 83020896000. Its totient is φ = 74375241984.

The previous prime is 78688411891. The next prime is 78688411951. The reversal of 78688411897 is 79811488687.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78688411897 is a prime.

It is a super-2 number, since 2×78688411897² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78688411891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21213679 + ... + 21217387.

It is an arithmetic number, because the mean of its divisors is an integer number (5188806000).

Almost surely, 2^78688411897 is an apocalyptic number.

It is an amenable number.

78688411897 is a deficient number, since it is larger than the sum of its proper divisors (4332484103).

78688411897 is a wasteful number, since it uses less digits than its factorization.

78688411897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6000.

The product of its digits is 43352064, while the sum is 67.

The spelling of 78688411897 in words is "seventy-eight billion, six hundred eighty-eight million, four hundred eleven thousand, eight hundred ninety-seven".