68493645 has 24 divisors (see below), whose sum is σ = 129516192. Its totient is φ = 33208800.

The previous prime is 68493643. The next prime is 68493653. The reversal of 68493645 is 54639486.

It is not a de Polignac number, because 68493645 - 2¹ = 68493643 is a prime.

It is a super-3 number, since 3×68493645³ (a number of 24 digits) contains 333 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 68493645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68493643) 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, 68691 + ... + 69680.

It is an arithmetic number, because the mean of its divisors is an integer number (5396508).

Almost surely, 2^68493645 is an apocalyptic number.

It is an amenable number.

68493645 is a deficient number, since it is larger than the sum of its proper divisors (61022547).

68493645 is a wasteful number, since it uses less digits than its factorization.

68493645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138393 (or 138390 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 68493645 is about 8276.0887501283. The cubic root of 68493645 is about 409.1508202492.

The spelling of 68493645 in words is "sixty-eight million, four hundred ninety-three thousand, six hundred forty-five".