1640716315 has 8 divisors (see below), whose sum is σ = 2250125280. Its totient is φ = 1125062592.

The previous prime is 1640716307. The next prime is 1640716349. The reversal of 1640716315 is 5136170461.

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 1640716315 - 2³ = 1640716307 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23438770 + ... + 23438839.

It is an arithmetic number, because the mean of its divisors is an integer number (281265660).

Almost surely, 2^1640716315 is an apocalyptic number.

1640716315 is a deficient number, since it is larger than the sum of its proper divisors (609408965).

1640716315 is an equidigital number, since it uses as much as digits as its factorization.

1640716315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46877621.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 1640716315 is about 40505.7565661969. The cubic root of 1640716315 is about 1179.4453763862.

Adding to 1640716315 its reverse (5136170461), we get a palindrome (6776886776).

The spelling of 1640716315 in words is "one billion, six hundred forty million, seven hundred sixteen thousand, three hundred fifteen".