105188987542 has 16 divisors (see below), whose sum is σ = 161665180992. Its totient is φ = 51301122880.

The previous prime is 105188987539. The next prime is 105188987597. The reversal of 105188987542 is 245789881501.

It is a super-2 number, since 2×105188987542² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 275568 + ... + 535084.

It is an arithmetic number, because the mean of its divisors is an integer number (10104073812).

Almost surely, 2^105188987542 is an apocalyptic number.

105188987542 is a deficient number, since it is larger than the sum of its proper divisors (56476193450).

105188987542 is a wasteful number, since it uses less digits than its factorization.

105188987542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264503.

The product of its (nonzero) digits is 6451200, while the sum is 58.

The spelling of 105188987542 in words is "one hundred five billion, one hundred eighty-eight million, nine hundred eighty-seven thousand, five hundred forty-two".