188444434961 has 4 divisors (see below), whose sum is σ = 192453891072. Its totient is φ = 184434978852.

The previous prime is 188444434951. The next prime is 188444434987. The reversal of 188444434961 is 169434444881.

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 188444434961 - 2²⁶ = 188377326097 is a prime.

It is a super-2 number, since 2×188444434961² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 188444434897 and 188444434906.

It is not an unprimeable number, because it can be changed into a prime (188444434951) 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, 2004727985 + ... + 2004728078.

It is an arithmetic number, because the mean of its divisors is an integer number (48113472768).

Almost surely, 2^188444434961 is an apocalyptic number.

It is an amenable number.

188444434961 is a deficient number, since it is larger than the sum of its proper divisors (4009456111).

188444434961 is an equidigital number, since it uses as much as digits as its factorization.

188444434961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4009456110.

The product of its digits is 10616832, while the sum is 56.

The spelling of 188444434961 in words is "one hundred eighty-eight billion, four hundred forty-four million, four hundred thirty-four thousand, nine hundred sixty-one".