68135507 has 12 divisors (see below), whose sum is σ = 78962856. Its totient is φ = 58295040.

The previous prime is 68135503. The next prime is 68135513. The reversal of 68135507 is 70553186.

It is not a de Polignac number, because 68135507 - 2² = 68135503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68135503) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 7538 + ... + 13895.

It is an arithmetic number, because the mean of its divisors is an integer number (6580238).

Almost surely, 2^68135507 is an apocalyptic number.

68135507 is a deficient number, since it is larger than the sum of its proper divisors (10827349).

68135507 is a wasteful number, since it uses less digits than its factorization.

68135507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21478 (or 21461 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 68135507 is about 8254.4234807768. The cubic root of 68135507 is about 408.4364542369.

The spelling of 68135507 in words is "sixty-eight million, one hundred thirty-five thousand, five hundred seven".