109557277605 has 12 divisors (see below), whose sum is σ = 189899281260. Its totient is φ = 58430548032.

The previous prime is 109557277547. The next prime is 109557277607. The reversal of 109557277605 is 506772755901.

109557277605 is a `hidden beast` number, since 1 + 0 + 9 + 5 + 5 + 7 + 27 + 7 + 605 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 86907629601 + 22649648004 = 294801^2 + 150498^2 .

It is not a de Polignac number, because 109557277605 - 2¹³ = 109557269413 is a prime.

It is a super-3 number, since 3×109557277605³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109557277607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1217303040 + ... + 1217303129.

It is an arithmetic number, because the mean of its divisors is an integer number (15824940105).

Almost surely, 2^109557277605 is an apocalyptic number.

109557277605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

109557277605 is a deficient number, since it is larger than the sum of its proper divisors (80342003655).

109557277605 is a wasteful number, since it uses less digits than its factorization.

109557277605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434606180 (or 2434606177 counting only the distinct ones).

The product of its (nonzero) digits is 4630500, while the sum is 54.

The spelling of 109557277605 in words is "one hundred nine billion, five hundred fifty-seven million, two hundred seventy-seven thousand, six hundred five".