68511775 has 24 divisors (see below), whose sum is σ = 89592480. Its totient is φ = 51891840.

The previous prime is 68511761. The next prime is 68511797. The reversal of 68511775 is 57711586.

It is not a de Polignac number, because 68511775 - 2¹⁵ = 68479007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37534 + ... + 39316.

It is an arithmetic number, because the mean of its divisors is an integer number (3733020).

Almost surely, 2^68511775 is an apocalyptic number.

68511775 is a deficient number, since it is larger than the sum of its proper divisors (21080705).

68511775 is a wasteful number, since it uses less digits than its factorization.

68511775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875 (or 1870 counting only the distinct ones).

The product of its digits is 58800, while the sum is 40.

The square root of 68511775 is about 8277.1840018209. The cubic root of 68511775 is about 409.1869172719.

The spelling of 68511775 in words is "sixty-eight million, five hundred eleven thousand, seven hundred seventy-five".