161606506566150 has 72 divisors (see below), whose sum is σ = 439678799395680. Its totient is φ = 42549561213120.

The previous prime is 161606506566139. The next prime is 161606506566151. The reversal of 161606506566150 is 51665605606161.

161606506566150 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 0 + 65 + 0 + 6 + 566 + 15 + 0 = 666.

161606506566150 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 2×161606506566150² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161606506566151) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2272911097 + ... + 2272982196.

Almost surely, 2^{161606506566150} is an apocalyptic number.

161606506566150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161606506566150 is an abundant number, since it is smaller than the sum of its proper divisors (278072292829530).

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

161606506566150 is a wasteful number, since it uses less digits than its factorization.

161606506566150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545893390 (or 4545893382 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 161606506566150 in words is "one hundred sixty-one trillion, six hundred six billion, five hundred six million, five hundred sixty-six thousand, one hundred fifty".