2161147947727 has 8 divisors (see below), whose sum is σ = 2255238298080. Its totient is φ = 2067068213760.

The previous prime is 2161147947709. The next prime is 2161147947793. The reversal of 2161147947727 is 7277497411612.

It is a happy number.

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 2161147947727 - 2²⁷ = 2161013729999 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 (2161147947527) 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, 2236702 + ... + 3053707.

It is an arithmetic number, because the mean of its divisors is an integer number (281904787260).

Almost surely, 2^{2161147947727} is an apocalyptic number.

2161147947727 is a deficient number, since it is larger than the sum of its proper divisors (94090350353).

2161147947727 is a wasteful number, since it uses less digits than its factorization.

2161147947727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5308193.

The product of its digits is 8297856, while the sum is 58.

The spelling of 2161147947727 in words is "two trillion, one hundred sixty-one billion, one hundred forty-seven million, nine hundred forty-seven thousand, seven hundred twenty-seven".