642278075813 has 8 divisors (see below), whose sum is σ = 731130774336. Its totient is φ = 558502674400.

The previous prime is 642278075771. The next prime is 642278075819. The reversal of 642278075813 is 318570872246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642278075813 - 2⁶ = 642278075749 is a prime.

It is a super-2 number, since 2×642278075813² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642278075819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1269324008 + ... + 1269324513.

It is an arithmetic number, because the mean of its divisors is an integer number (91391346792).

Almost surely, 2^642278075813 is an apocalyptic number.

It is an amenable number.

642278075813 is a deficient number, since it is larger than the sum of its proper divisors (88852698523).

642278075813 is a wasteful number, since it uses less digits than its factorization.

642278075813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2538648555.

The product of its (nonzero) digits is 4515840, while the sum is 53.

The spelling of 642278075813 in words is "six hundred forty-two billion, two hundred seventy-eight million, seventy-five thousand, eight hundred thirteen".