1641040287 has 4 divisors (see below), whose sum is σ = 2188053720. Its totient is φ = 1094026856.

The previous prime is 1641040267. The next prime is 1641040309. The reversal of 1641040287 is 7820401461.

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

It is a cyclic number.

It is not a de Polignac number, because 1641040287 - 2¹¹ = 1641038239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641040237) 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, 273506712 + ... + 273506717.

It is an arithmetic number, because the mean of its divisors is an integer number (547013430).

Almost surely, 2^1641040287 is an apocalyptic number.

1641040287 is a deficient number, since it is larger than the sum of its proper divisors (547013433).

1641040287 is an equidigital number, since it uses as much as digits as its factorization.

1641040287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547013432.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 1641040287 is about 40509.7554547050. The cubic root of 1641040287 is about 1179.5230014509.

The spelling of 1641040287 in words is "one billion, six hundred forty-one million, forty thousand, two hundred eighty-seven".