42504660655 has 4 divisors (see below), whose sum is σ = 51005592792. Its totient is φ = 34003728520.

The previous prime is 42504660623. The next prime is 42504660659. The reversal of 42504660655 is 55606640524.

It is a happy number.

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

It is not a de Polignac number, because 42504660655 - 2⁵ = 42504660623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42504660659) 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, 4250466061 + ... + 4250466070.

It is an arithmetic number, because the mean of its divisors is an integer number (12751398198).

Almost surely, 2^42504660655 is an apocalyptic number.

42504660655 is a deficient number, since it is larger than the sum of its proper divisors (8500932137).

42504660655 is an equidigital number, since it uses as much as digits as its factorization.

42504660655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8500932136.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 42504660655 in words is "forty-two billion, five hundred four million, six hundred sixty thousand, six hundred fifty-five".