68538015 has 96 divisors (see below), whose sum is σ = 152832960. Its totient is φ = 28885248.

The previous prime is 68538011. The next prime is 68538031. The reversal of 68538015 is 51083586.

It is not a de Polignac number, because 68538015 - 2² = 68538011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68538011) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 85597 + ... + 86393.

It is an arithmetic number, because the mean of its divisors is an integer number (1592010).

Almost surely, 2^68538015 is an apocalyptic number.

68538015 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

68538015 is an abundant number, since it is smaller than the sum of its proper divisors (84294945).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68538015 is a wasteful number, since it uses less digits than its factorization.

68538015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 68538015 is about 8278.7689302214. The cubic root of 68538015 is about 409.2391501142.

The spelling of 68538015 in words is "sixty-eight million, five hundred thirty-eight thousand, fifteen".