1913928880189 has 4 divisors (see below), whose sum is σ = 1927899164124. Its totient is φ = 1899958596256.

The previous prime is 1913928880111. The next prime is 1913928880219. The reversal of 1913928880189 is 9810888293191.

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

It can be written as a sum of positive squares in 2 ways, for example, as 869587955289 + 1044340924900 = 932517^2 + 1021930^2 .

It is a cyclic number.

It is not a de Polignac number, because 1913928880189 - 2¹³ = 1913928871997 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913928880489) 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, 6985141762 + ... + 6985142035.

It is an arithmetic number, because the mean of its divisors is an integer number (481974791031).

Almost surely, 2^{1913928880189} is an apocalyptic number.

It is an amenable number.

1913928880189 is a deficient number, since it is larger than the sum of its proper divisors (13970283935).

1913928880189 is a wasteful number, since it uses less digits than its factorization.

1913928880189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13970283934.

The product of its (nonzero) digits is 17915904, while the sum is 67.

The spelling of 1913928880189 in words is "one trillion, nine hundred thirteen billion, nine hundred twenty-eight million, eight hundred eighty thousand, one hundred eighty-nine".