642829255108 has 12 divisors (see below), whose sum is σ = 1124972539180. Its totient is φ = 321408529632.

The previous prime is 642829255069. The next prime is 642829255109. The reversal of 642829255108 is 801552928246.

It can be written as a sum of positive squares in 2 ways, for example, as 13818472704 + 629010782404 = 117552^2 + 793102^2 .

It is a super-2 number, since 2×642829255108² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (642829255109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1283043 + ... + 1712266.

Almost surely, 2^642829255108 is an apocalyptic number.

It is an amenable number.

642829255108 is a deficient number, since it is larger than the sum of its proper divisors (482143284072).

642829255108 is a wasteful number, since it uses less digits than its factorization.

642829255108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3048966 (or 3048964 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 52.

The spelling of 642829255108 in words is "six hundred forty-two billion, eight hundred twenty-nine million, two hundred fifty-five thousand, one hundred eight".