427642725617 has 4 divisors (see below), whose sum is σ = 433500845220. Its totient is φ = 421784606016.

The previous prime is 427642725577. The next prime is 427642725619. The reversal of 427642725617 is 716527246724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 162730753201 + 264911972416 = 403399^2 + 514696^2 .

It is a cyclic number.

It is not a de Polignac number, because 427642725617 - 2²⁰ = 427641677041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427642725619) 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, 2929059692 + ... + 2929059837.

It is an arithmetic number, because the mean of its divisors is an integer number (108375211305).

Almost surely, 2^427642725617 is an apocalyptic number.

It is an amenable number.

427642725617 is a deficient number, since it is larger than the sum of its proper divisors (5858119603).

427642725617 is an equidigital number, since it uses as much as digits as its factorization.

427642725617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5858119602.

The product of its digits is 7902720, while the sum is 53.

The spelling of 427642725617 in words is "four hundred twenty-seven billion, six hundred forty-two million, seven hundred twenty-five thousand, six hundred seventeen".