1640497383 has 12 divisors (see below), whose sum is σ = 2708122768. Its totient is φ = 937427040.

The previous prime is 1640497367. The next prime is 1640497409. The reversal of 1640497383 is 3837940461.

It is not a de Polignac number, because 1640497383 - 2⁴ = 1640497367 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 (1640497303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13019758 + ... + 13019883.

Almost surely, 2^1640497383 is an apocalyptic number.

1640497383 is a deficient number, since it is larger than the sum of its proper divisors (1067625385).

1640497383 is a wasteful number, since it uses less digits than its factorization.

1640497383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26039654 (or 26039651 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 1640497383 is about 40503.0539959643. The cubic root of 1640497383 is about 1179.3929135648.

The spelling of 1640497383 in words is "one billion, six hundred forty million, four hundred ninety-seven thousand, three hundred eighty-three".