1640893353 has 16 divisors (see below), whose sum is σ = 2451262656. Its totient is φ = 967602240.

The previous prime is 1640893337. The next prime is 1640893357. The reversal of 1640893353 is 3533980461.

It is not a de Polignac number, because 1640893353 - 2⁴ = 1640893337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1640893357) 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, 670726 + ... + 673167.

It is an arithmetic number, because the mean of its divisors is an integer number (153203916).

Almost surely, 2^1640893353 is an apocalyptic number.

It is an amenable number.

1640893353 is a deficient number, since it is larger than the sum of its proper divisors (810369303).

1640893353 is a wasteful number, since it uses less digits than its factorization.

1640893353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343944.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 1640893353 is about 40507.9418509507. The cubic root of 1640893353 is about 1179.4877967077.

The spelling of 1640893353 in words is "one billion, six hundred forty million, eight hundred ninety-three thousand, three hundred fifty-three".