161153450690172 has 96 divisors (see below), whose sum is σ = 380491678990080. Its totient is φ = 53082231713280.

The previous prime is 161153450690117. The next prime is 161153450690269. The reversal of 161153450690172 is 271096054351161.

161153450690172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6477997398 + ... + 6478022274.

It is an arithmetic number, because the mean of its divisors is an integer number (3963454989480).

Almost surely, 2^{161153450690172} is an apocalyptic number.

161153450690172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161153450690172 is an abundant number, since it is smaller than the sum of its proper divisors (219338228299908).

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

161153450690172 is a wasteful number, since it uses less digits than its factorization.

161153450690172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37451 (or 37449 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 161153450690172 in words is "one hundred sixty-one trillion, one hundred fifty-three billion, four hundred fifty million, six hundred ninety thousand, one hundred seventy-two".