68149020835 has 16 divisors (see below), whose sum is σ = 93472839936. Its totient is φ = 46725094368.

The previous prime is 68149020817. The next prime is 68149020839. The reversal of 68149020835 is 53802094186.

It is a cyclic number.

It is not a de Polignac number, because 68149020835 - 2⁵ = 68149020803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68149020839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186012 + ... + 413398.

It is an arithmetic number, because the mean of its divisors is an integer number (5842052496).

Almost surely, 2^68149020835 is an apocalyptic number.

68149020835 is a deficient number, since it is larger than the sum of its proper divisors (25323819101).

68149020835 is a wasteful number, since it uses less digits than its factorization.

68149020835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235962.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 68149020835 in words is "sixty-eight billion, one hundred forty-nine million, twenty thousand, eight hundred thirty-five".