108649091842 has 16 divisors (see below), whose sum is σ = 163877833080. Its totient is φ = 54023977728.

The previous prime is 108649091839. The next prime is 108649091897. The reversal of 108649091842 is 248190946801.

It can be written as a sum of positive squares in 4 ways, for example, as 50894908801 + 57754183041 = 225599^2 + 240321^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 108649091842.

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, 54988 + ... + 469384.

Almost surely, 2^108649091842 is an apocalyptic number.

108649091842 is a deficient number, since it is larger than the sum of its proper divisors (55228741238).

108649091842 is a wasteful number, since it uses less digits than its factorization.

108649091842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415125.

The product of its (nonzero) digits is 995328, while the sum is 52.

The spelling of 108649091842 in words is "one hundred eight billion, six hundred forty-nine million, ninety-one thousand, eight hundred forty-two".