8161238217373 has 4 divisors (see below), whose sum is σ = 8164680327808. Its totient is φ = 8157796106940.

The previous prime is 8161238217371. The next prime is 8161238217401. The reversal of 8161238217373 is 3737128321618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8161238217373 - 2¹ = 8161238217371 is a prime.

It is a super-2 number, since 2×8161238217373² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8161238217373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161238217371) 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, 1721051661 + ... + 1721056402.

It is an arithmetic number, because the mean of its divisors is an integer number (2041170081952).

Almost surely, 2^{8161238217373} is an apocalyptic number.

It is an amenable number.

8161238217373 is a deficient number, since it is larger than the sum of its proper divisors (3442110435).

8161238217373 is a wasteful number, since it uses less digits than its factorization.

8161238217373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3442110434.

The product of its digits is 2032128, while the sum is 52.

The spelling of 8161238217373 in words is "eight trillion, one hundred sixty-one billion, two hundred thirty-eight million, two hundred seventeen thousand, three hundred seventy-three".