68699136 has 176 divisors, whose sum is σ = 212232960. Its totient is φ = 19537920.

The previous prime is 68699129. The next prime is 68699153. The reversal of 68699136 is 63199686.

It is a tau number, because it is divible by the number of its divisors (176).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 641995 + ... + 642101.

Almost surely, 2^68699136 is an apocalyptic number.

68699136 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68699136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106116480).

68699136 is an abundant number, since it is smaller than the sum of its proper divisors (143533824).

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

68699136 is a wasteful number, since it uses less digits than its factorization.

68699136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 142 counting only the distinct ones).

The product of its digits is 419904, while the sum is 48.

The square root of 68699136 is about 8288.4941937604. The cubic root of 68699136 is about 409.5595826005.

The spelling of 68699136 in words is "sixty-eight million, six hundred ninety-nine thousand, one hundred thirty-six".