68999526 has 80 divisors (see below), whose sum is σ = 168577200. Its totient is φ = 21010752.

The previous prime is 68999519. The next prime is 68999537. The reversal of 68999526 is 62599986.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 88876 + ... + 89648.

It is an arithmetic number, because the mean of its divisors is an integer number (2107215).

Almost surely, 2^68999526 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68999526, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84288600).

68999526 is an abundant number, since it is smaller than the sum of its proper divisors (99577674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68999526 is a wasteful number, since it uses less digits than its factorization.

68999526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835 (or 826 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 68999526 is about 8306.5953314219. The cubic root of 68999526 is about 410.1556537689.

The spelling of 68999526 in words is "sixty-eight million, nine hundred ninety-nine thousand, five hundred twenty-six".