45168703681 has 4 divisors (see below), whose sum is σ = 45220208212. Its totient is φ = 45117199152.

The previous prime is 45168703637. The next prime is 45168703711. The reversal of 45168703681 is 18630786154.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30551893681 + 14616810000 = 174791^2 + 120900^2 .

It is a cyclic number.

It is not a de Polignac number, because 45168703681 - 2²⁹ = 44631832769 is a prime.

It is a super-2 number, since 2×45168703681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45168103681) 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, 25750950 + ... + 25752703.

It is an arithmetic number, because the mean of its divisors is an integer number (11305052053).

Almost surely, 2^45168703681 is an apocalyptic number.

It is an amenable number.

45168703681 is a deficient number, since it is larger than the sum of its proper divisors (51504531).

45168703681 is an equidigital number, since it uses as much as digits as its factorization.

45168703681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51504530.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 45168703681 in words is "forty-five billion, one hundred sixty-eight million, seven hundred three thousand, six hundred eighty-one".