1640350933 has 16 divisors (see below), whose sum is σ = 1819933696. Its totient is φ = 1468653120.

The previous prime is 1640350931. The next prime is 1640350949. The reversal of 1640350933 is 3390530461.

It is a cyclic number.

It is not a de Polignac number, because 1640350933 - 2¹ = 1640350931 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 (1640350931) 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, 154060 + ... + 164362.

It is an arithmetic number, because the mean of its divisors is an integer number (113745856).

Almost surely, 2^1640350933 is an apocalyptic number.

1640350933 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1640350933 is a deficient number, since it is larger than the sum of its proper divisors (179582763).

1640350933 is a wasteful number, since it uses less digits than its factorization.

1640350933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10684.

The product of its (nonzero) digits is 29160, while the sum is 34.

The square root of 1640350933 is about 40501.2460672508. The cubic root of 1640350933 is about 1179.3578170479.

The spelling of 1640350933 in words is "one billion, six hundred forty million, three hundred fifty thousand, nine hundred thirty-three".