191344120789898 has 4 divisors (see below), whose sum is σ = 287016181184850. Its totient is φ = 95672060394948.

The previous prime is 191344120789897. The next prime is 191344120789909. The reversal of 191344120789898 is 898987021443191.

191344120789898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 191033779321009 + 310341468889 = 13821497^2 + 557083^2 .

It is a super-2 number, since 2×191344120789898² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (191344120789891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47836030197473 + ... + 47836030197476.

Almost surely, 2^{191344120789898} is an apocalyptic number.

191344120789898 is a deficient number, since it is larger than the sum of its proper divisors (95672060394952).

191344120789898 is an equidigital number, since it uses as much as digits as its factorization.

191344120789898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95672060394951.

The product of its (nonzero) digits is 250822656, while the sum is 74.

The spelling of 191344120789898 in words is "one hundred ninety-one trillion, three hundred forty-four billion, one hundred twenty million, seven hundred eighty-nine thousand, eight hundred ninety-eight".