427240810881 has 12 divisors (see below), whose sum is σ = 617849103508. Its totient is φ = 284493289824.

The previous prime is 427240810849. The next prime is 427240810901. The reversal of 427240810881 is 188018042724.

427240810881 is a `hidden beast` number, since 427 + 2 + 40 + 8 + 108 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 36946990656 + 390293820225 = 192216^2 + 624735^2 .

It is not a de Polignac number, because 427240810881 - 2⁵ = 427240810849 is a prime.

It is a super-2 number, since 2×427240810881² (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 (427240817881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27818350 + ... + 27833703.

Almost surely, 2^427240810881 is an apocalyptic number.

It is an amenable number.

427240810881 is a deficient number, since it is larger than the sum of its proper divisors (190608292627).

427240810881 is a wasteful number, since it uses less digits than its factorization.

427240810881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55652912 (or 55652909 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 45.

The spelling of 427240810881 in words is "four hundred twenty-seven billion, two hundred forty million, eight hundred ten thousand, eight hundred eighty-one".