424239887569 has 9 divisors (see below), whose sum is σ = 443502726793. Its totient is φ = 405780345652.

The previous prime is 424239887537. The next prime is 424239887587. The reversal of 424239887569 is 965788932424.

The square root of 424239887569 is 651337.

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

It is not a de Polignac number, because 424239887569 - 2⁵ = 424239887537 is a prime.

It is a super-2 number, since 2×424239887569² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (424239887509) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14966592 + ... + 14994910.

Almost surely, 2^424239887569 is an apocalyptic number.

424239887569 is the 651337-th square number.

424239887569 is the 325669-th centered octagonal number.

It is an amenable number.

424239887569 is a deficient number, since it is larger than the sum of its proper divisors (19262839224).

424239887569 is an frugal number, since it uses more digits than its factorization.

424239887569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56684 (or 28342 counting only the distinct ones).

The product of its digits is 209018880, while the sum is 67.

The spelling of 424239887569 in words is "four hundred twenty-four billion, two hundred thirty-nine million, eight hundred eighty-seven thousand, five hundred sixty-nine".