68161193465 has 16 divisors (see below), whose sum is σ = 86106806400. Its totient is φ = 51653935872.

The previous prime is 68161193461. The next prime is 68161193479. The reversal of 68161193465 is 56439116186.

It is a cyclic number.

It is not a de Polignac number, because 68161193465 - 2² = 68161193461 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68161193461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1143521 + ... + 1201649.

It is an arithmetic number, because the mean of its divisors is an integer number (5381675400).

Almost surely, 2^68161193465 is an apocalyptic number.

It is an amenable number.

68161193465 is a deficient number, since it is larger than the sum of its proper divisors (17945612935).

68161193465 is a wasteful number, since it uses less digits than its factorization.

68161193465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70496.

The product of its digits is 933120, while the sum is 50.

The spelling of 68161193465 in words is "sixty-eight billion, one hundred sixty-one million, one hundred ninety-three thousand, four hundred sixty-five".