27433440561 has 16 divisors (see below), whose sum is σ = 38137190400. Its totient is φ = 17519257728.

The previous prime is 27433440553. The next prime is 27433440637. The reversal of 27433440561 is 16504433472.

It is not a de Polignac number, because 27433440561 - 2³ = 27433440553 is a prime.

It is a super-2 number, since 2×27433440561² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27433440511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1230396 + ... + 1252493.

It is an arithmetic number, because the mean of its divisors is an integer number (2383574400).

Almost surely, 2^27433440561 is an apocalyptic number.

It is an amenable number.

27433440561 is a deficient number, since it is larger than the sum of its proper divisors (10703749839).

27433440561 is a wasteful number, since it uses less digits than its factorization.

27433440561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483048.

The product of its (nonzero) digits is 241920, while the sum is 39.

The spelling of 27433440561 in words is "twenty-seven billion, four hundred thirty-three million, four hundred forty thousand, five hundred sixty-one".