155511066105 has 24 divisors (see below), whose sum is σ = 279535943232. Its totient is φ = 82939234608.

The previous prime is 155511066091. The next prime is 155511066167. The reversal of 155511066105 is 501660115551.

It is a happy number.

It is not a de Polignac number, because 155511066105 - 2¹¹ = 155511064057 is a prime.

It is a super-2 number, since 2×155511066105² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155511066105.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63995109 + ... + 63997538.

It is an arithmetic number, because the mean of its divisors is an integer number (11647330968).

Almost surely, 2^155511066105 is an apocalyptic number.

155511066105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155511066105 is a deficient number, since it is larger than the sum of its proper divisors (124024877127).

155511066105 is an equidigital number, since it uses as much as digits as its factorization.

155511066105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127992667 (or 127992655 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 155511066105 in words is "one hundred fifty-five billion, five hundred eleven million, sixty-six thousand, one hundred five".