186768678361 has 4 divisors (see below), whose sum is σ = 186793664932. Its totient is φ = 186743691792.

The previous prime is 186768678353. The next prime is 186768678367. The reversal of 186768678361 is 163876867681.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 136393569225 + 50375109136 = 369315^2 + 224444^2 .

It is a cyclic number.

It is not a de Polignac number, because 186768678361 - 2³ = 186768678353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (186768678367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12482070 + ... + 12497023.

It is an arithmetic number, because the mean of its divisors is an integer number (46698416233).

Almost surely, 2^186768678361 is an apocalyptic number.

It is an amenable number.

186768678361 is a deficient number, since it is larger than the sum of its proper divisors (24986571).

186768678361 is an equidigital number, since it uses as much as digits as its factorization.

186768678361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24986570.

The product of its digits is 97542144, while the sum is 67.

The spelling of 186768678361 in words is "one hundred eighty-six billion, seven hundred sixty-eight million, six hundred seventy-eight thousand, three hundred sixty-one".