1640424133 has 8 divisors (see below), whose sum is σ = 1667276352. Its totient is φ = 1613774976.

The previous prime is 1640424131. The next prime is 1640424143. The reversal of 1640424133 is 3314240461.

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 1640424133 - 2¹ = 1640424131 is a prime.

It is a super-2 number, since 2×1640424133² = 5381982672257603378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640424131) 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, 34435 + ... + 66832.

It is an arithmetic number, because the mean of its divisors is an integer number (208409544).

Almost surely, 2^1640424133 is an apocalyptic number.

It is an amenable number.

1640424133 is a deficient number, since it is larger than the sum of its proper divisors (26852219).

1640424133 is a wasteful number, since it uses less digits than its factorization.

1640424133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101531.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 1640424133 is about 40502.1497330697. The cubic root of 1640424133 is about 1179.3753595762.

Adding to 1640424133 its reverse (3314240461), we get a palindrome (4954664594).

The spelling of 1640424133 in words is "one billion, six hundred forty million, four hundred twenty-four thousand, one hundred thirty-three".