61171668865999 has 8 divisors (see below), whose sum is σ = 63296064439920. Its totient is φ = 59048275137600.

The previous prime is 61171668865927. The next prime is 61171668866023. The reversal of 61171668865999 is 99956886617116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61171668865999 - 2²¹ = 61171666768847 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 (61171668863999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250337142 + ... + 250581379.

It is an arithmetic number, because the mean of its divisors is an integer number (7912008054990).

Almost surely, 2^{61171668865999} is an apocalyptic number.

61171668865999 is a deficient number, since it is larger than the sum of its proper divisors (2124395573921).

61171668865999 is a wasteful number, since it uses less digits than its factorization.

61171668865999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500922761.

The product of its digits is 2116316160, while the sum is 82.

The spelling of 61171668865999 in words is "sixty-one trillion, one hundred seventy-one billion, six hundred sixty-eight million, eight hundred sixty-five thousand, nine hundred ninety-nine".