1640326514 has 8 divisors (see below), whose sum is σ = 2460691548. Its totient is φ = 820096000.

The previous prime is 1640326469. The next prime is 1640326517. The reversal of 1640326514 is 4156230461.

It can be written as a sum of positive squares in 2 ways, for example, as 1634827489 + 5499025 = 40433^2 + 2345^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1640326517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6374 + ... + 57630.

Almost surely, 2^1640326514 is an apocalyptic number.

1640326514 is a deficient number, since it is larger than the sum of its proper divisors (820365034).

1640326514 is a wasteful number, since it uses less digits than its factorization.

1640326514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67260.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 1640326514 is about 40500.9446062681. The cubic root of 1640326514 is about 1179.3519648690.

Adding to 1640326514 its reverse (4156230461), we get a palindrome (5796556975).

The spelling of 1640326514 in words is "one billion, six hundred forty million, three hundred twenty-six thousand, five hundred fourteen".