2161860069947 has 8 divisors (see below), whose sum is σ = 2176531676592. Its totient is φ = 2147218437600.

The previous prime is 2161860069937. The next prime is 2161860069979. The reversal of 2161860069947 is 7499600681612.

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 2161860069947 - 2⁴ = 2161860069931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161860069937) 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, 7348829 + ... + 7637342.

It is an arithmetic number, because the mean of its divisors is an integer number (272066459574).

Almost surely, 2^{2161860069947} is an apocalyptic number.

2161860069947 is a deficient number, since it is larger than the sum of its proper divisors (14671606645).

2161860069947 is a wasteful number, since it uses less digits than its factorization.

2161860069947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14987149.

The product of its (nonzero) digits is 7838208, while the sum is 59.

The spelling of 2161860069947 in words is "two trillion, one hundred sixty-one billion, eight hundred sixty million, sixty-nine thousand, nine hundred forty-seven".