189976554769 has 9 divisors (see below), whose sum is σ = 201816876027. Its totient is φ = 178794489504.

The previous prime is 189976554739. The next prime is 189976554773. The reversal of 189976554769 is 967455679981.

The square root of 189976554769 is 435863.

It is a perfect power (a square), and thus also a powerful number.

189976554769 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 only one way, i.e., 147905622225 + 42070932544 = 384585^2 + 205112^2 .

It is not a de Polignac number, because 189976554769 - 2¹¹ = 189976552721 is a prime.

It is a super-2 number, since 2×189976554769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189976554695 and 189976554704.

It is not an unprimeable number, because it can be changed into a prime (189976554709) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 7396852 + ... + 7422490.

Almost surely, 2^189976554769 is an apocalyptic number.

189976554769 is the 435863-rd square number.

189976554769 is the 217932-nd centered octagonal number.

It is an amenable number.

189976554769 is a deficient number, since it is larger than the sum of its proper divisors (11840321258).

189976554769 is an frugal number, since it uses more digits than its factorization.

189976554769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51312 (or 25656 counting only the distinct ones).

The product of its digits is 1028764800, while the sum is 76.

The spelling of 189976554769 in words is "one hundred eighty-nine billion, nine hundred seventy-six million, five hundred fifty-four thousand, seven hundred sixty-nine".