3518508768643 has 4 divisors (see below), whose sum is σ = 3838373202168. Its totient is φ = 3198644335120.

The previous prime is 3518508768623. The next prime is 3518508768653. The reversal of 3518508768643 is 3468678058153.

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

It is a cyclic number.

It is not a de Polignac number, because 3518508768643 - 2²⁵ = 3518475214211 is a prime.

It is a super-2 number, since 2×3518508768643² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3518508768623) 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, 159932216746 + ... + 159932216767.

It is an arithmetic number, because the mean of its divisors is an integer number (959593300542).

Almost surely, 2^{3518508768643} is an apocalyptic number.

3518508768643 is a deficient number, since it is larger than the sum of its proper divisors (319864433525).

3518508768643 is a wasteful number, since it uses less digits than its factorization.

3518508768643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319864433524.

The product of its (nonzero) digits is 116121600, while the sum is 64.

The spelling of 3518508768643 in words is "three trillion, five hundred eighteen billion, five hundred eight million, seven hundred sixty-eight thousand, six hundred forty-three".