1640223633 has 16 divisors (see below), whose sum is σ = 2285122176. Its totient is φ = 1044531840.

The previous prime is 1640223623. The next prime is 1640223643. The reversal of 1640223633 is 3363220461.

It is an interprime number because it is at equal distance from previous prime (1640223623) and next prime (1640223643).

It is not a de Polignac number, because 1640223633 - 2¹³ = 1640215441 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1640223633.

It is not an unprimeable number, because it can be changed into a prime (1640223623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36891 + ... + 68127.

It is an arithmetic number, because the mean of its divisors is an integer number (142820136).

Almost surely, 2^1640223633 is an apocalyptic number.

It is an amenable number.

1640223633 is a deficient number, since it is larger than the sum of its proper divisors (644898543).

1640223633 is a wasteful number, since it uses less digits than its factorization.

1640223633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32024.

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 1640223633 is about 40499.6744801733. The cubic root of 1640223633 is about 1179.3273081019.

The spelling of 1640223633 in words is "one billion, six hundred forty million, two hundred twenty-three thousand, six hundred thirty-three".