68685615 has 48 divisors (see below), whose sum is σ = 125349120. Its totient is φ = 34744320.

The previous prime is 68685611. The next prime is 68685623. The reversal of 68685615 is 51658686.

68685615 is a `hidden beast` number, since 6 + 86 + 8 + 561 + 5 = 666.

It is not a de Polignac number, because 68685615 - 2² = 68685611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68685611) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73471 + ... + 74399.

It is an arithmetic number, because the mean of its divisors is an integer number (2611440).

Almost surely, 2^68685615 is an apocalyptic number.

68685615 is a deficient number, since it is larger than the sum of its proper divisors (56663505).

68685615 is a wasteful number, since it uses less digits than its factorization.

68685615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024 (or 1021 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 68685615 is about 8287.6785048649. The cubic root of 68685615 is about 409.5327117218.

The spelling of 68685615 in words is "sixty-eight million, six hundred eighty-five thousand, six hundred fifteen".