100438787642 has 16 divisors (see below), whose sum is σ = 152165385000. Its totient is φ = 49717094400.

The previous prime is 100438787587. The next prime is 100438787707. The reversal of 100438787642 is 246787834001.

It can be written as a sum of positive squares in 4 ways, for example, as 74446576801 + 25992210841 = 272849^2 + 161221^2 .

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 7 ways as a sum of consecutive naturals, for example, 2657534 + ... + 2695062.

Almost surely, 2^100438787642 is an apocalyptic number.

100438787642 is a deficient number, since it is larger than the sum of its proper divisors (51726597358).

100438787642 is a wasteful number, since it uses less digits than its factorization.

100438787642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50881.

The product of its (nonzero) digits is 1806336, while the sum is 50.

The spelling of 100438787642 in words is "one hundred billion, four hundred thirty-eight million, seven hundred eighty-seven thousand, six hundred forty-two".