189874497290 has 16 divisors (see below), whose sum is σ = 351011233512. Its totient is φ = 73897101504.

The previous prime is 189874497289. The next prime is 189874497313. The reversal of 189874497290 is 92794478981.

189874497290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 164648481361 + 25226015929 = 405769^2 + 158827^2 .

It is a super-2 number, since 2×189874497290² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 189874497290.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256586789 + ... + 256587528.

Almost surely, 2^189874497290 is an apocalyptic number.

189874497290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189874497290 is a deficient number, since it is larger than the sum of its proper divisors (161136736222).

189874497290 is a wasteful number, since it uses less digits than its factorization.

189874497290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513174361.

The product of its (nonzero) digits is 73156608, while the sum is 68.

The spelling of 189874497290 in words is "one hundred eighty-nine billion, eight hundred seventy-four million, four hundred ninety-seven thousand, two hundred ninety".