68085615 has 32 divisors (see below), whose sum is σ = 118512576. Its totient is φ = 33177600.

The previous prime is 68085599. The next prime is 68085617. The reversal of 68085615 is 51658086.

It is not a de Polignac number, because 68085615 - 2⁴ = 68085599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68085617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17967 + ... + 21423.

It is an arithmetic number, because the mean of its divisors is an integer number (3703518).

Almost surely, 2^68085615 is an apocalyptic number.

68085615 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

68085615 is a deficient number, since it is larger than the sum of its proper divisors (50426961).

68085615 is a wasteful number, since it uses less digits than its factorization.

68085615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3579.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 68085615 is about 8251.4007901689. The cubic root of 68085615 is about 408.3367378123.

The spelling of 68085615 in words is "sixty-eight million, eighty-five thousand, six hundred fifteen".