187049704865 has 4 divisors (see below), whose sum is σ = 224459645844. Its totient is φ = 149639763888.

The previous prime is 187049704861. The next prime is 187049704901. The reversal of 187049704865 is 568407940781.

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 70926875041 + 116122829824 = 266321^2 + 340768^2 .

It is a cyclic number.

It is not a de Polignac number, because 187049704865 - 2² = 187049704861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (187049704861) 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, 18704970482 + ... + 18704970491.

It is an arithmetic number, because the mean of its divisors is an integer number (56114911461).

Almost surely, 2^187049704865 is an apocalyptic number.

It is an amenable number.

187049704865 is a deficient number, since it is larger than the sum of its proper divisors (37409940979).

187049704865 is an equidigital number, since it uses as much as digits as its factorization.

187049704865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37409940978.

The product of its (nonzero) digits is 13547520, while the sum is 59.

The spelling of 187049704865 in words is "one hundred eighty-seven billion, forty-nine million, seven hundred four thousand, eight hundred sixty-five".