68532511 has 4 divisors (see below), whose sum is σ = 68622400. Its totient is φ = 68442624.

The previous prime is 68532493. The next prime is 68532517. The reversal of 68532511 is 11523586.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68532511 - 2⁷ = 68532383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68532517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43791 + ... + 45328.

It is an arithmetic number, because the mean of its divisors is an integer number (17155600).

Almost surely, 2^68532511 is an apocalyptic number.

68532511 is a deficient number, since it is larger than the sum of its proper divisors (89889).

68532511 is an equidigital number, since it uses as much as digits as its factorization.

68532511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89888.

The product of its digits is 7200, while the sum is 31.

The square root of 68532511 is about 8278.4365069740. The cubic root of 68532511 is about 409.2281950621.

The spelling of 68532511 in words is "sixty-eight million, five hundred thirty-two thousand, five hundred eleven".