642442250100 has 144 divisors (see below), whose sum is σ = 2156049448448. Its totient is φ = 144652210560.

The previous prime is 642442250053. The next prime is 642442250119. The reversal of 642442250100 is 1052244246.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 2142322 + ... + 2423721.

Almost surely, 2^642442250100 is an apocalyptic number.

642442250100 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

642442250100 is an abundant number, since it is smaller than the sum of its proper divisors (1513607198348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642442250100 is a wasteful number, since it uses less digits than its factorization.

642442250100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4566134 (or 4566127 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 642442250100 its reverse (1052244246), we get a palindrome (643494494346).

The spelling of 642442250100 in words is "six hundred forty-two billion, four hundred forty-two million, two hundred fifty thousand, one hundred".