109640399544 has 96 divisors (see below), whose sum is σ = 321746814480. Its totient is φ = 33528494592.

The previous prime is 109640399537. The next prime is 109640399549. The reversal of 109640399544 is 445993046901.

It is a happy number.

109640399544 is a `hidden beast` number, since 1 + 0 + 9 + 6 + 4 + 0 + 3 + 99 + 544 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109640399549) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 206749 + ... + 511884.

Almost surely, 2^109640399544 is an apocalyptic number.

It is an amenable number.

109640399544 is an abundant number, since it is smaller than the sum of its proper divisors (212106414936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

109640399544 is a wasteful number, since it uses less digits than its factorization.

109640399544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718821 (or 718814 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 109640399544 in words is "one hundred nine billion, six hundred forty million, three hundred ninety-nine thousand, five hundred forty-four".