642255377105 has 24 divisors (see below), whose sum is σ = 819774989880. Its totient is φ = 482950840320.

The previous prime is 642255377033. The next prime is 642255377107. The reversal of 642255377105 is 501773552246.

It can be written as a sum of positive squares in 12 ways, for example, as 2000951824 + 640254425281 = 44732^2 + 800159^2 .

It is not a de Polignac number, because 642255377105 - 2¹⁶ = 642255311569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 642255377105.

It is not an unprimeable number, because it can be changed into a prime (642255377107) 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 23 ways as a sum of consecutive naturals, for example, 822215 + ... + 1400195.

It is an arithmetic number, because the mean of its divisors is an integer number (34157291245).

Almost surely, 2^642255377105 is an apocalyptic number.

It is an amenable number.

642255377105 is a deficient number, since it is larger than the sum of its proper divisors (177519612775).

642255377105 is a wasteful number, since it uses less digits than its factorization.

642255377105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578789 (or 578772 counting only the distinct ones).

The product of its (nonzero) digits is 1764000, while the sum is 47.

The spelling of 642255377105 in words is "six hundred forty-two billion, two hundred fifty-five million, three hundred seventy-seven thousand, one hundred five".