161101165511100 has 72 divisors (see below), whose sum is σ = 466171794119920. Its totient is φ = 42955479290880.

The previous prime is 161101165511093. The next prime is 161101165511137. The reversal of 161101165511100 is 1115561101161.

It is a happy number.

161101165511100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161101165511100² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 27524605 + ... + 32860404.

Almost surely, 2^{161101165511100} is an apocalyptic number.

161101165511100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161101165511100 is an abundant number, since it is smaller than the sum of its proper divisors (305070628608820).

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

161101165511100 is a wasteful number, since it uses less digits than its factorization.

161101165511100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60393919 (or 60393912 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 30.

The spelling of 161101165511100 in words is "one hundred sixty-one trillion, one hundred one billion, one hundred sixty-five million, five hundred eleven thousand, one hundred".