408112712569 has 9 divisors (see below), whose sum is σ = 430735645893. Its totient is φ = 386621597052.

The previous prime is 408112712561. The next prime is 408112712573. The reversal of 408112712569 is 965217211804.

The square root of 408112712569 is 638837.

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

It is not a de Polignac number, because 408112712569 - 2³ = 408112712561 is a prime.

It is a super-2 number, since 2×408112712569² (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 (408112712561) 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, 12121092 + ... + 12154714.

Almost surely, 2^408112712569 is an apocalyptic number.

408112712569 is the 638837-th square number.

408112712569 is the 319419-th centered octagonal number.

It is an amenable number.

408112712569 is a deficient number, since it is larger than the sum of its proper divisors (22622933324).

408112712569 is an frugal number, since it uses more digits than its factorization.

408112712569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67284 (or 33642 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 408112712569 in words is "four hundred eight billion, one hundred twelve million, seven hundred twelve thousand, five hundred sixty-nine".