161001601011650 has 96 divisors (see below), whose sum is σ = 362483681738112. Its totient is φ = 51937928985600.

The previous prime is 161001601011649. The next prime is 161001601011659. The reversal of 161001601011650 is 56110106100161.

It is a happy number.

161001601011650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161001601011659) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15872360 + ... + 23956940.

It is an arithmetic number, because the mean of its divisors is an integer number (3775871684772).

Almost surely, 2^{161001601011650} is an apocalyptic number.

161001601011650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161001601011650 is an abundant number, since it is smaller than the sum of its proper divisors (201482080726462).

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

161001601011650 is a wasteful number, since it uses less digits than its factorization.

161001601011650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8087964 (or 8087959 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 29.

The spelling of 161001601011650 in words is "one hundred sixty-one trillion, one billion, six hundred one million, eleven thousand, six hundred fifty".