1640244063 has 8 divisors (see below), whose sum is σ = 2202726400. Its totient is φ = 1085628888.

The previous prime is 1640244049. The next prime is 1640244083. The reversal of 1640244063 is 3604420461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1640244063 - 2⁶ = 1640243999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1640244063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640244013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1966303 + ... + 1967136.

It is an arithmetic number, because the mean of its divisors is an integer number (275340800).

Almost surely, 2^1640244063 is an apocalyptic number.

1640244063 is a deficient number, since it is larger than the sum of its proper divisors (562482337).

1640244063 is a wasteful number, since it uses less digits than its factorization.

1640244063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3933581.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 1640244063 is about 40499.9267036374. The cubic root of 1640244063 is about 1179.3322044987.

The spelling of 1640244063 in words is "one billion, six hundred forty million, two hundred forty-four thousand, sixty-three".