68819157 has 24 divisors (see below), whose sum is σ = 108781920. Its totient is φ = 41578080.

The previous prime is 68819143. The next prime is 68819167. The reversal of 68819157 is 75191886.

It is not a de Polignac number, because 68819157 - 2⁸ = 68818901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68819167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37618 + ... + 39404.

It is an arithmetic number, because the mean of its divisors is an integer number (4532580).

Almost surely, 2^68819157 is an apocalyptic number.

It is an amenable number.

68819157 is a deficient number, since it is larger than the sum of its proper divisors (39962763).

68819157 is a wasteful number, since it uses less digits than its factorization.

68819157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2193 (or 2190 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 68819157 is about 8295.7312516740. The cubic root of 68819157 is about 409.7979512098.

The spelling of 68819157 in words is "sixty-eight million, eight hundred nineteen thousand, one hundred fifty-seven".