186872914945 has 4 divisors (see below), whose sum is σ = 224247497940. Its totient is φ = 149498331952.

The previous prime is 186872914939. The next prime is 186872914967. The reversal of 186872914945 is 549419278681.

It is a Cunningham number, because it is equal to 432288²+1.

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 67273834384 + 119599080561 = 259372^2 + 345831^2 .

It is a cyclic number.

It is not a de Polignac number, because 186872914945 - 2³ = 186872914937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18687291490 + ... + 18687291499.

It is an arithmetic number, because the mean of its divisors is an integer number (56061874485).

Almost surely, 2^186872914945 is an apocalyptic number.

It is an amenable number.

186872914945 is a deficient number, since it is larger than the sum of its proper divisors (37374582995).

186872914945 is an equidigital number, since it uses as much as digits as its factorization.

186872914945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37374582994.

The product of its digits is 34836480, while the sum is 64.

The spelling of 186872914945 in words is "one hundred eighty-six billion, eight hundred seventy-two million, nine hundred fourteen thousand, nine hundred forty-five".