405492589089 has 27 divisors (see below), whose sum is σ = 681360357873. Its totient is φ = 231702409512.

The previous prime is 405492589079. The next prime is 405492589091. The reversal of 405492589089 is 980985294504.

The square root of 405492589089 is 636783.

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

405492589089 is a `hidden beast` number, since 4 + 0 + 5 + 49 + 2 + 589 + 0 + 8 + 9 = 666.

It is not a de Polignac number, because 405492589089 - 2⁹ = 405492588577 is a prime.

It is a super-2 number, since 2×405492589089² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (405492589049) 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, 13357282 + ... + 13387604.

Almost surely, 2^405492589089 is an apocalyptic number.

405492589089 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

405492589089 is the 636783-rd square number.

405492589089 is the 318392-nd centered octagonal number.

It is an amenable number.

405492589089 is a deficient number, since it is larger than the sum of its proper divisors (275867768784).

405492589089 is an frugal number, since it uses more digits than its factorization.

405492589089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60666 (or 30333 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 63.

The spelling of 405492589089 in words is "four hundred five billion, four hundred ninety-two million, five hundred eighty-nine thousand, eighty-nine".