1640040803 has 8 divisors (see below), whose sum is σ = 1726771200. Its totient is φ = 1553351688.

The previous prime is 1640040797. The next prime is 1640040823. The reversal of 1640040803 is 3080400461.

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

It is not a de Polignac number, because 1640040803 - 2⁶ = 1640040739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1640040823) 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, 103550 + ... + 118332.

It is an arithmetic number, because the mean of its divisors is an integer number (215846400).

Almost surely, 2^1640040803 is an apocalyptic number.

1640040803 is a deficient number, since it is larger than the sum of its proper divisors (86730397).

1640040803 is a wasteful number, since it uses less digits than its factorization.

1640040803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20641.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1640040803 is about 40497.4172386339. The cubic root of 1640040803 is about 1179.2834879750.

The spelling of 1640040803 in words is "one billion, six hundred forty million, forty thousand, eight hundred three".