68996499845 has 32 divisors (see below), whose sum is σ = 104070693888. Its totient is φ = 42743294208.

The previous prime is 68996499841. The next prime is 68996499877. The reversal of 68996499845 is 54899469986.

It is a cyclic number.

It is not a de Polignac number, because 68996499845 - 2² = 68996499841 is a prime.

It is a super-2 number, since 2×68996499845² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68996499841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1591814 + ... + 1634583.

It is an arithmetic number, because the mean of its divisors is an integer number (3252209184).

Almost surely, 2^68996499845 is an apocalyptic number.

68996499845 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68996499845 is a deficient number, since it is larger than the sum of its proper divisors (35074194043).

68996499845 is a wasteful number, since it uses less digits than its factorization.

68996499845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3226469.

The product of its digits is 1209323520, while the sum is 77.

The spelling of 68996499845 in words is "sixty-eight billion, nine hundred ninety-six million, four hundred ninety-nine thousand, eight hundred forty-five".