189672458077 has 2 divisors, whose sum is σ = 189672458078. Its totient is φ = 189672458076.

The previous prime is 189672458009. The next prime is 189672458083. The reversal of 189672458077 is 770854276981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189473901796 + 198556281 = 435286^2 + 14091^2 .

It is a cyclic number.

It is not a de Polignac number, because 189672458077 - 2¹⁵ = 189672425309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189672458377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94836229038 + 94836229039.

It is an arithmetic number, because the mean of its divisors is an integer number (94836229039).

Almost surely, 2^189672458077 is an apocalyptic number.

It is an amenable number.

189672458077 is a deficient number, since it is larger than the sum of its proper divisors (1).

189672458077 is an equidigital number, since it uses as much as digits as its factorization.

189672458077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47416320, while the sum is 64.

The spelling of 189672458077 in words is "one hundred eighty-nine billion, six hundred seventy-two million, four hundred fifty-eight thousand, seventy-seven".