68509536 has 48 divisors (see below), whose sum is σ = 180278784. Its totient is φ = 22780544.

The previous prime is 68509517. The next prime is 68509537. The reversal of 68509536 is 63590586.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68509537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61561 + ... + 62663.

It is an arithmetic number, because the mean of its divisors is an integer number (3755808).

Almost surely, 2^68509536 is an apocalyptic number.

It is an amenable number.

68509536 is an abundant number, since it is smaller than the sum of its proper divisors (111769248).

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

68509536 is a wasteful number, since it uses less digits than its factorization.

68509536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763 (or 1755 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 68509536 is about 8277.0487494034. The cubic root of 68509536 is about 409.1824597438.

The spelling of 68509536 in words is "sixty-eight million, five hundred nine thousand, five hundred thirty-six".