161500005606650 has 12 divisors (see below), whose sum is σ = 300390010428462. Its totient is φ = 64600002242640.

The previous prime is 161500005606649. The next prime is 161500005606677. The reversal of 161500005606650 is 56606500005161.

161500005606650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 108228005886361 + 53271999720289 = 10403269^2 + 7298767^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161500005606598 and 161500005606607.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1615000056017 + ... + 1615000056116.

Almost surely, 2^{161500005606650} is an apocalyptic number.

161500005606650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161500005606650 is a deficient number, since it is larger than the sum of its proper divisors (138890004821812).

161500005606650 is a wasteful number, since it uses less digits than its factorization.

161500005606650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3230000112145 (or 3230000112140 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 161500005606650 in words is "one hundred sixty-one trillion, five hundred billion, five million, six hundred six thousand, six hundred fifty".