68161577 has 4 divisors (see below), whose sum is σ = 74358096. Its totient is φ = 61965060.

The previous prime is 68161573. The next prime is 68161601. The reversal of 68161577 is 77516186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68161577 - 2² = 68161573 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68161573) 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, 3098243 + ... + 3098264.

It is an arithmetic number, because the mean of its divisors is an integer number (18589524).

Almost surely, 2^68161577 is an apocalyptic number.

It is an amenable number.

68161577 is a deficient number, since it is larger than the sum of its proper divisors (6196519).

68161577 is a wasteful number, since it uses less digits than its factorization.

68161577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6196518.

The product of its digits is 70560, while the sum is 41.

The square root of 68161577 is about 8256.0024830423. The cubic root of 68161577 is about 408.4885395645.

Subtracting from 68161577 its sum of digits (41), we obtain a square (68161536 = 8256²).

The spelling of 68161577 in words is "sixty-eight million, one hundred sixty-one thousand, five hundred seventy-seven".