42531646655 has 4 divisors (see below), whose sum is σ = 51037975992. Its totient is φ = 34025317320.

The previous prime is 42531646627. The next prime is 42531646697. The reversal of 42531646655 is 55664613524.

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

It is not a de Polignac number, because 42531646655 - 2³⁴ = 25351777471 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, 4253164661 + ... + 4253164670.

It is an arithmetic number, because the mean of its divisors is an integer number (12759493998).

Almost surely, 2^42531646655 is an apocalyptic number.

42531646655 is a deficient number, since it is larger than the sum of its proper divisors (8506329337).

42531646655 is an equidigital number, since it uses as much as digits as its factorization.

42531646655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8506329336.

The product of its digits is 2592000, while the sum is 47.

The spelling of 42531646655 in words is "forty-two billion, five hundred thirty-one million, six hundred forty-six thousand, six hundred fifty-five".