189451956250 has 48 divisors (see below), whose sum is σ = 356467044024. Its totient is φ = 75510400000.

The previous prime is 189451956241. The next prime is 189451956263. The reversal of 189451956250 is 52659154981.

It can be written as a sum of positive squares in 12 ways, for example, as 18376242481 + 171075713769 = 135559^2 + 413613^2 .

It is a junction number, because it is equal to n+sod(n) for n = 189451956191 and 189451956200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1702314 + ... + 1810186.

Almost surely, 2^189451956250 is an apocalyptic number.

189451956250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189451956250 is a deficient number, since it is larger than the sum of its proper divisors (167015087774).

189451956250 is an equidigital number, since it uses as much as digits as its factorization.

189451956250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108181 (or 108161 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 55.

The spelling of 189451956250 in words is "one hundred eighty-nine billion, four hundred fifty-one million, nine hundred fifty-six thousand, two hundred fifty".