1640133529 has 8 divisors (see below), whose sum is σ = 1645396200. Its totient is φ = 1634880000.

The previous prime is 1640133403. The next prime is 1640133533. The reversal of 1640133529 is 9253310461.

It can be written as a sum of positive squares in 4 ways, for example, as 432432025 + 1207701504 = 20795^2 + 34752^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1640133529 - 2⁹ = 1640133017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1640133494 and 1640133503.

It is not an unprimeable number, because it can be changed into a prime (1640133569) 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, 545029 + ... + 548029.

It is an arithmetic number, because the mean of its divisors is an integer number (205674525).

Almost surely, 2^1640133529 is an apocalyptic number.

It is an amenable number.

1640133529 is a deficient number, since it is larger than the sum of its proper divisors (5262671).

1640133529 is a wasteful number, since it uses less digits than its factorization.

1640133529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4571.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 1640133529 is about 40498.5620608930. The cubic root of 1640133529 is about 1179.3057126619.

The spelling of 1640133529 in words is "one billion, six hundred forty million, one hundred thirty-three thousand, five hundred twenty-nine".