109945136539 has 4 divisors (see below), whose sum is σ = 125651584624. Its totient is φ = 94238688456.

The previous prime is 109945136513. The next prime is 109945136573. The reversal of 109945136539 is 935631549901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935631549901 = 9349 ⋅100078249.

It is a cyclic number.

It is not a de Polignac number, because 109945136539 - 2⁹ = 109945136027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109945136539.

It is not an unprimeable number, because it can be changed into a prime (109945136239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7853224032 + ... + 7853224045.

It is an arithmetic number, because the mean of its divisors is an integer number (31412896156).

Almost surely, 2^109945136539 is an apocalyptic number.

109945136539 is a deficient number, since it is larger than the sum of its proper divisors (15706448085).

109945136539 is an equidigital number, since it uses as much as digits as its factorization.

109945136539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15706448084.

The product of its (nonzero) digits is 3936600, while the sum is 55.

The spelling of 109945136539 in words is "one hundred nine billion, nine hundred forty-five million, one hundred thirty-six thousand, five hundred thirty-nine".