427558964561 has 4 divisors (see below), whose sum is σ = 433940441712. Its totient is φ = 421177487412.

The previous prime is 427558964557. The next prime is 427558964611. The reversal of 427558964561 is 165469855724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 427558964561 - 2² = 427558964557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 427558964494 and 427558964503.

It is not an unprimeable number, because it can be changed into a prime (427558964461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3190738475 + ... + 3190738608.

It is an arithmetic number, because the mean of its divisors is an integer number (108485110428).

Almost surely, 2^427558964561 is an apocalyptic number.

It is an amenable number.

427558964561 is a deficient number, since it is larger than the sum of its proper divisors (6381477151).

427558964561 is an equidigital number, since it uses as much as digits as its factorization.

427558964561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6381477150.

The product of its digits is 72576000, while the sum is 62.

The spelling of 427558964561 in words is "four hundred twenty-seven billion, five hundred fifty-eight million, nine hundred sixty-four thousand, five hundred sixty-one".