68615712 has 144 divisors (see below), whose sum is σ = 215822880. Its totient is φ = 20676480.

The previous prime is 68615683. The next prime is 68615717. The reversal of 68615712 is 21751686.

68615712 is a `hidden beast` number, since 6 + 86 + 1 + 571 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (68615717) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 383239 + ... + 383417.

It is an arithmetic number, because the mean of its divisors is an integer number (1498770).

Almost surely, 2^68615712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68615712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107911440).

68615712 is an abundant number, since it is smaller than the sum of its proper divisors (147207168).

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

68615712 is a wasteful number, since it uses less digits than its factorization.

68615712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 195 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 68615712 is about 8283.4601465813. The cubic root of 68615712 is about 409.3937341387.

The spelling of 68615712 in words is "sixty-eight million, six hundred fifteen thousand, seven hundred twelve".