42887677685 has 4 divisors (see below), whose sum is σ = 51465213228. Its totient is φ = 34310142144.

The previous prime is 42887677661. The next prime is 42887677699. The reversal of 42887677685 is 58677678824.

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 10398696676 + 32488981009 = 101974^2 + 180247^2 .

It is a cyclic number.

It is not a de Polignac number, because 42887677685 - 2¹² = 42887673589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4288767764 + ... + 4288767773.

It is an arithmetic number, because the mean of its divisors is an integer number (12866303307).

Almost surely, 2^42887677685 is an apocalyptic number.

It is an amenable number.

42887677685 is a deficient number, since it is larger than the sum of its proper divisors (8577535543).

42887677685 is an equidigital number, since it uses as much as digits as its factorization.

42887677685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8577535542.

The product of its digits is 252887040, while the sum is 68.

The spelling of 42887677685 in words is "forty-two billion, eight hundred eighty-seven million, six hundred seventy-seven thousand, six hundred eighty-five".