189374515873 has 2 divisors, whose sum is σ = 189374515874. Its totient is φ = 189374515872.

The previous prime is 189374515843. The next prime is 189374515949. The reversal of 189374515873 is 378515473981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187773155584 + 1601360289 = 433328^2 + 40017^2 .

It is a cyclic number.

It is not a de Polignac number, because 189374515873 - 2³³ = 180784581281 is a prime.

It is not a weakly prime, because it can be changed into another prime (189374515843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94687257936 + 94687257937.

It is an arithmetic number, because the mean of its divisors is an integer number (94687257937).

Almost surely, 2^189374515873 is an apocalyptic number.

It is an amenable number.

189374515873 is a deficient number, since it is larger than the sum of its proper divisors (1).

189374515873 is an equidigital number, since it uses as much as digits as its factorization.

189374515873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25401600, while the sum is 61.

The spelling of 189374515873 in words is "one hundred eighty-nine billion, three hundred seventy-four million, five hundred fifteen thousand, eight hundred seventy-three".