1640110807 has 4 divisors (see below), whose sum is σ = 1647884056. Its totient is φ = 1632337560.

The previous prime is 1640110781. The next prime is 1640110817. The reversal of 1640110807 is 7080110461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7080110461 = 41 ⋅172685621.

It is a cyclic number.

It is not a de Polignac number, because 1640110807 - 2⁷ = 1640110679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640110817) 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, 3886308 + ... + 3886729.

It is an arithmetic number, because the mean of its divisors is an integer number (411971014).

Almost surely, 2^1640110807 is an apocalyptic number.

1640110807 is a deficient number, since it is larger than the sum of its proper divisors (7773249).

1640110807 is an equidigital number, since it uses as much as digits as its factorization.

1640110807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7773248.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 1640110807 is about 40498.2815314428. The cubic root of 1640110807 is about 1179.3002667012.

The spelling of 1640110807 in words is "one billion, six hundred forty million, one hundred ten thousand, eight hundred seven".