424057532809 has 9 divisors (see below), whose sum is σ = 429545407053. Its totient is φ = 418638922572.

The previous prime is 424057532771. The next prime is 424057532839. The reversal of 424057532809 is 908235750424.

It is a happy number.

The square root of 424057532809 is 651197.

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

It is a de Polignac number, because none of the positive numbers 2^k-424057532809 is a prime.

It is a super-2 number, since 2×424057532809² (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 (424057532839) 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, 51440442 + ... + 51448684.

Almost surely, 2^424057532809 is an apocalyptic number.

424057532809 is the 651197-th square number.

424057532809 is the 325599-th centered octagonal number.

It is an amenable number.

424057532809 is a deficient number, since it is larger than the sum of its proper divisors (5487874244).

424057532809 is an frugal number, since it uses more digits than its factorization.

424057532809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16644 (or 8322 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 49.

Multiplying 424057532809 by its sum of digits (49), we get a square (20778819107641 = 4558379²).

The spelling of 424057532809 in words is "four hundred twenty-four billion, fifty-seven million, five hundred thirty-two thousand, eight hundred nine".