187115939761 has 3 divisors (see below), whose sum is σ = 187116372331. Its totient is φ = 187115507192.

The previous prime is 187115939753. The next prime is 187115939797. The reversal of 187115939761 is 167939511781.

The square root of 187115939761 is 432569.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 40549474161 + 146566465600 = 201369^2 + 382840^2 .

It is not a de Polignac number, because 187115939761 - 2³ = 187115939753 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 187115939696 and 187115939705.

It is not an unprimeable number, because it can be changed into a prime (187115930761) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 216285 + ... + 648853.

Almost surely, 2^187115939761 is an apocalyptic number.

187115939761 is the 432569-th square number.

187115939761 is the 216285-th centered octagonal number.

It is an amenable number.

187115939761 is a deficient number, since it is larger than the sum of its proper divisors (432570).

187115939761 is an frugal number, since it uses more digits than its factorization.

187115939761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865138 (or 432569 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 58.

The spelling of 187115939761 in words is "one hundred eighty-seven billion, one hundred fifteen million, nine hundred thirty-nine thousand, seven hundred sixty-one".