68997499567 has 4 divisors (see below), whose sum is σ = 71376723720. Its totient is φ = 66618275416.

The previous prime is 68997499537. The next prime is 68997499651. The reversal of 68997499567 is 76599479986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76599479986 = 2 ⋅38299739993.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68997499567 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 (68997499507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1189612033 + ... + 1189612090.

It is an arithmetic number, because the mean of its divisors is an integer number (17844180930).

Almost surely, 2^68997499567 is an apocalyptic number.

68997499567 is a deficient number, since it is larger than the sum of its proper divisors (2379224153).

68997499567 is a wasteful number, since it uses less digits than its factorization.

68997499567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379224152.

The product of its digits is 1851776640, while the sum is 79.

The spelling of 68997499567 in words is "sixty-eight billion, nine hundred ninety-seven million, four hundred ninety-nine thousand, five hundred sixty-seven".