17640477013 has 8 divisors (see below), whose sum is σ = 18137938232. Its totient is φ = 17144104896.

The previous prime is 17640477007. The next prime is 17640477031. The reversal of 17640477013 is 31077404671.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10081565649 + 7558911364 = 100407^2 + 86942^2 .

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 17640477013 - 2⁹ = 17640476501 is a prime.

It is a super-2 number, since 2×17640477013² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17640477313) 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, 239370 + ... + 304267.

It is an arithmetic number, because the mean of its divisors is an integer number (2267242279).

Almost surely, 2^17640477013 is an apocalyptic number.

It is an amenable number.

17640477013 is a deficient number, since it is larger than the sum of its proper divisors (497461219).

17640477013 is an equidigital number, since it uses as much as digits as its factorization.

17640477013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544551.

The product of its (nonzero) digits is 98784, while the sum is 40.

The spelling of 17640477013 in words is "seventeen billion, six hundred forty million, four hundred seventy-seven thousand, thirteen".