642624330505 has 4 divisors (see below), whose sum is σ = 771149196612. Its totient is φ = 514099464400.

The previous prime is 642624330499. The next prime is 642624330511. The reversal of 642624330505 is 505033426246.

642624330505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (642624330499) and next prime (642624330511).

It can be written as a sum of positive squares in 2 ways, for example, as 494192128144 + 148432202361 = 702988^2 + 385269^2 .

It is not a de Polignac number, because 642624330505 - 2⁹ = 642624329993 is a prime.

It is a Duffinian 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, 64262433046 + ... + 64262433055.

It is an arithmetic number, because the mean of its divisors is an integer number (192787299153).

Almost surely, 2^642624330505 is an apocalyptic number.

It is an amenable number.

642624330505 is a deficient number, since it is larger than the sum of its proper divisors (128524866107).

642624330505 is a wasteful number, since it uses less digits than its factorization.

642624330505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128524866106.

The product of its (nonzero) digits is 518400, while the sum is 40.

The spelling of 642624330505 in words is "six hundred forty-two billion, six hundred twenty-four million, three hundred thirty thousand, five hundred five".