67538643 has 8 divisors (see below), whose sum is σ = 90298368. Its totient is φ = 44902344.

The previous prime is 67538633. The next prime is 67538683. The reversal of 67538643 is 34683576.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-67538643 is a prime.

It is a super-2 number, since 2×67538643² = 9122936596562898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 67538595 and 67538604.

It is not an unprimeable number, because it can be changed into a prime (67538623) 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, 29571 + ... + 31772.

It is an arithmetic number, because the mean of its divisors is an integer number (11287296).

Almost surely, 2^67538643 is an apocalyptic number.

67538643 is a deficient number, since it is larger than the sum of its proper divisors (22759725).

67538643 is a wasteful number, since it uses less digits than its factorization.

67538643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61713.

The product of its digits is 362880, while the sum is 42.

The square root of 67538643 is about 8218.1897641756. The cubic root of 67538643 is about 407.2403263630.

The spelling of 67538643 in words is "sixty-seven million, five hundred thirty-eight thousand, six hundred forty-three".