68812557 has 8 divisors (see below), whose sum is σ = 100091040. Its totient is φ = 41704560.

The previous prime is 68812543. The next prime is 68812577. The reversal of 68812557 is 75521886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68812557 - 2⁸ = 68812301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68812577) 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, 1042582 + ... + 1042647.

It is an arithmetic number, because the mean of its divisors is an integer number (12511380).

Almost surely, 2^68812557 is an apocalyptic number.

It is an amenable number.

68812557 is a deficient number, since it is larger than the sum of its proper divisors (31278483).

68812557 is a wasteful number, since it uses less digits than its factorization.

68812557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085243.

The product of its digits is 134400, while the sum is 42.

The square root of 68812557 is about 8295.3334471858. Note that the first 3 decimals coincide. The cubic root of 68812557 is about 409.7848504344.

The spelling of 68812557 in words is "sixty-eight million, eight hundred twelve thousand, five hundred fifty-seven".