68125557 has 4 divisors (see below), whose sum is σ = 90834080. Its totient is φ = 45417036.

The previous prime is 68125549. The next prime is 68125567. The reversal of 68125557 is 75552186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 68125557 - 2³ = 68125549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68125537) 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 3 ways as a sum of consecutive naturals, for example, 11354257 + ... + 11354262.

It is an arithmetic number, because the mean of its divisors is an integer number (22708520).

Almost surely, 2^68125557 is an apocalyptic number.

It is an amenable number.

68125557 is a deficient number, since it is larger than the sum of its proper divisors (22708523).

68125557 is a wasteful number, since it uses less digits than its factorization.

68125557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22708522.

The product of its digits is 84000, while the sum is 39.

The square root of 68125557 is about 8253.8207516277. The cubic root of 68125557 is about 408.4165716004.

The spelling of 68125557 in words is "sixty-eight million, one hundred twenty-five thousand, five hundred fifty-seven".