68140575 has 72 divisors (see below), whose sum is σ = 131725200. Its totient is φ = 34493760.

The previous prime is 68140571. The next prime is 68140601. The reversal of 68140575 is 57504186.

68140575 is a `hidden beast` number, since 6 + 81 + 4 + 0 + 575 = 666.

It is not a de Polignac number, because 68140575 - 2² = 68140571 is a prime.

It is a super-2 number, since 2×68140575² = 9286275922661250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68140571) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1154896 + ... + 1154954.

Almost surely, 2^68140575 is an apocalyptic number.

68140575 is a deficient number, since it is larger than the sum of its proper divisors (63584625).

68140575 is a wasteful number, since it uses less digits than its factorization.

68140575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 68140575 is about 8254.7304619836. The cubic root of 68140575 is about 408.4465806488.

The spelling of 68140575 in words is "sixty-eight million, one hundred forty thousand, five hundred seventy-five".