1640376713 has 4 divisors (see below), whose sum is σ = 1640715780. Its totient is φ = 1640037648.

The previous prime is 1640376707. The next prime is 1640376719. The reversal of 1640376713 is 3176730461.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1640376707) and next prime (1640376719).

It can be written as a sum of positive squares in 2 ways, for example, as 1211596864 + 428779849 = 34808^2 + 20707^2 .

It is a cyclic number.

It is not a de Polignac number, because 1640376713 - 2¹⁸ = 1640114569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1640376719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162170 + ... + 171987.

It is an arithmetic number, because the mean of its divisors is an integer number (410178945).

Almost surely, 2^1640376713 is an apocalyptic number.

It is an amenable number.

1640376713 is a deficient number, since it is larger than the sum of its proper divisors (339067).

1640376713 is an equidigital number, since it uses as much as digits as its factorization.

1640376713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339066.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 1640376713 is about 40501.5643278133. The cubic root of 1640376713 is about 1179.3639953367.

The spelling of 1640376713 in words is "one billion, six hundred forty million, three hundred seventy-six thousand, seven hundred thirteen".