3181601964889 has 4 divisors (see below), whose sum is σ = 3182425577856. Its totient is φ = 3180778351924.

The previous prime is 3181601964833. The next prime is 3181601964901. The reversal of 3181601964889 is 9884691061813.

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 3181601964889 - 2¹⁹ = 3181601440601 is a prime.

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 3181601964889.

It is not an unprimeable number, because it can be changed into a prime (3181601964589) 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, 411800689 + ... + 411808414.

It is an arithmetic number, because the mean of its divisors is an integer number (795606394464).

Almost surely, 2^{3181601964889} is an apocalyptic number.

It is an amenable number.

3181601964889 is a deficient number, since it is larger than the sum of its proper divisors (823612967).

3181601964889 is an equidigital number, since it uses as much as digits as its factorization.

3181601964889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823612966.

The product of its (nonzero) digits is 17915904, while the sum is 64.

The spelling of 3181601964889 in words is "three trillion, one hundred eighty-one billion, six hundred one million, nine hundred sixty-four thousand, eight hundred eighty-nine".