68561153 has 4 divisors (see below), whose sum is σ = 72594180. Its totient is φ = 64528128.

The previous prime is 68561149. The next prime is 68561159. The reversal of 68561153 is 35116586.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37736449 + 30824704 = 6143^2 + 5552^2 .

It is a cyclic number.

It is not a de Polignac number, because 68561153 - 2² = 68561149 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68561159) 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, 2016488 + ... + 2016521.

It is an arithmetic number, because the mean of its divisors is an integer number (18148545).

Almost surely, 2^68561153 is an apocalyptic number.

It is an amenable number.

68561153 is a deficient number, since it is larger than the sum of its proper divisors (4033027).

68561153 is a wasteful number, since it uses less digits than its factorization.

68561153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033026.

The product of its digits is 21600, while the sum is 35.

The square root of 68561153 is about 8280.1662422925. The cubic root of 68561153 is about 409.2851971151.

The spelling of 68561153 in words is "sixty-eight million, five hundred sixty-one thousand, one hundred fifty-three".