187040744465 has 12 divisors (see below), whose sum is σ = 229790035764. Its totient is φ = 146152760544.

The previous prime is 187040744453. The next prime is 187040744483. The reversal of 187040744465 is 564447040781.

It can be written as a sum of positive squares in 2 ways, for example, as 77185619329 + 109855125136 = 277823^2 + 331444^2 .

It is not a de Polignac number, because 187040744465 - 2³² = 182745777169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10106534 + ... + 10125023.

It is an arithmetic number, because the mean of its divisors is an integer number (19149169647).

Almost surely, 2^187040744465 is an apocalyptic number.

It is an amenable number.

187040744465 is a deficient number, since it is larger than the sum of its proper divisors (42749291299).

187040744465 is an equidigital number, since it uses as much as digits as its factorization.

187040744465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20231648 (or 20231605 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 50.

The spelling of 187040744465 in words is "one hundred eighty-seven billion, forty million, seven hundred forty-four thousand, four hundred sixty-five".