68121635 has 12 divisors (see below), whose sum is σ = 86839248. Its totient is φ = 51290496.

The previous prime is 68121617. The next prime is 68121643. The reversal of 68121635 is 53612186.

It is a happy number.

It is not a de Polignac number, because 68121635 - 2²⁶ = 1012771 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22127 + ... + 25016.

It is an arithmetic number, because the mean of its divisors is an integer number (7236604).

Almost surely, 2^68121635 is an apocalyptic number.

68121635 is a deficient number, since it is larger than the sum of its proper divisors (18717613).

68121635 is a wasteful number, since it uses less digits than its factorization.

68121635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47182 (or 47165 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 68121635 is about 8253.5831612700. The cubic root of 68121635 is about 408.4087339126.

The spelling of 68121635 in words is "sixty-eight million, one hundred twenty-one thousand, six hundred thirty-five".