1640126313 has 24 divisors (see below), whose sum is σ = 2807791168. Its totient is φ = 937214064.

The previous prime is 1640126263. The next prime is 1640126329. The reversal of 1640126313 is 3136210461.

1640126313 is a `hidden beast` number, since 1 + 640 + 1 + 2 + 6 + 3 + 13 = 666.

It is not a de Polignac number, because 1640126313 - 2⁹ = 1640125801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1640126363) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 480406 + ... + 483807.

Almost surely, 2^1640126313 is an apocalyptic number.

It is an amenable number.

1640126313 is a deficient number, since it is larger than the sum of its proper divisors (1167664855).

1640126313 is an frugal number, since it uses more digits than its factorization.

1640126313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964235 (or 964223 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1640126313 is about 40498.4729712121. The cubic root of 1640126313 is about 1179.3039831518.

Adding to 1640126313 its reverse (3136210461), we get a palindrome (4776336774).

The spelling of 1640126313 in words is "one billion, six hundred forty million, one hundred twenty-six thousand, three hundred thirteen".