4245771517729 has 27 divisors (see below), whose sum is σ = 5047084624017. Its totient is φ = 3561233540424.

The previous prime is 4245771517723. The next prime is 4245771517739. The reversal of 4245771517729 is 9277151775424.

The square root of 4245771517729 is 2060527.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 4245771517729 - 2¹⁵ = 4245771484961 is a prime.

It is a super-2 number, since 2×4245771517729² (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 (4245771517723) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 677910252 + ... + 677916514.

Almost surely, 2^{4245771517729} is an apocalyptic number.

4245771517729 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

4245771517729 is the 2060527-th square number.

4245771517729 is the 1030264-th centered octagonal number.

It is an amenable number.

4245771517729 is a deficient number, since it is larger than the sum of its proper divisors (801313106288).

4245771517729 is an frugal number, since it uses more digits than its factorization.

4245771517729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12634 (or 6317 counting only the distinct ones).

The product of its digits is 34574400, while the sum is 61.

The spelling of 4245771517729 in words is "four trillion, two hundred forty-five billion, seven hundred seventy-one million, five hundred seventeen thousand, seven hundred twenty-nine".