161500011101616 has 80 divisors (see below), whose sum is σ = 455260381970688. Its totient is φ = 48926065363200.

The previous prime is 161500011101587. The next prime is 161500011101617. The reversal of 161500011101616 is 616101110005161.

161500011101616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161500011101616² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161500011101617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39722191 + ... + 43598766.

Almost surely, 2^{161500011101616} is an apocalyptic number.

161500011101616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161500011101616 is an abundant number, since it is smaller than the sum of its proper divisors (293760370869072).

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

161500011101616 is a wasteful number, since it uses less digits than its factorization.

161500011101616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83324650 (or 83324644 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 30.

Adding to 161500011101616 its reverse (616101110005161), we get a palindrome (777601121106777).

The spelling of 161500011101616 in words is "one hundred sixty-one trillion, five hundred billion, eleven million, one hundred one thousand, six hundred sixteen".