68643552 has 48 divisors (see below), whose sum is σ = 190793232. Its totient is φ = 21534720.

The previous prime is 68643529. The next prime is 68643557. The reversal of 68643552 is 25534686.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 68643552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68643557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19399 + ... + 22662.

It is an arithmetic number, because the mean of its divisors is an integer number (3974859).

Almost surely, 2^68643552 is an apocalyptic number.

It is an amenable number.

68643552 is an abundant number, since it is smaller than the sum of its proper divisors (122149680).

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

68643552 is a wasteful number, since it uses less digits than its factorization.

68643552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42091 (or 42083 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

The square root of 68643552 is about 8285.1404333300. The cubic root of 68643552 is about 409.4490955134.

The spelling of 68643552 in words is "sixty-eight million, six hundred forty-three thousand, five hundred fifty-two".