109961989545 has 16 divisors (see below), whose sum is σ = 180230383872. Its totient is φ = 57215994240.

The previous prime is 109961989523. The next prime is 109961989583. The reversal of 109961989545 is 545989169901.

It is not a de Polignac number, because 109961989545 - 2¹⁸ = 109961727401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89399377 + ... + 89400606.

It is an arithmetic number, because the mean of its divisors is an integer number (11264398992).

Almost surely, 2^109961989545 is an apocalyptic number.

109961989545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

109961989545 is a deficient number, since it is larger than the sum of its proper divisors (70268394327).

109961989545 is a wasteful number, since it uses less digits than its factorization.

109961989545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178800032.

The product of its (nonzero) digits is 31492800, while the sum is 66.

The spelling of 109961989545 in words is "one hundred nine billion, nine hundred sixty-one million, nine hundred eighty-nine thousand, five hundred forty-five".