161106056501550 has 96 divisors (see below), whose sum is σ = 400301928322560. Its totient is φ = 42880061817600.

The previous prime is 161106056501443. The next prime is 161106056501603. The reversal of 161106056501550 is 55105650601161.

It is a super-2 number, since 2×161106056501550² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 259962555 + ... + 260581545.

It is an arithmetic number, because the mean of its divisors is an integer number (4169811753360).

Almost surely, 2^{161106056501550} is an apocalyptic number.

161106056501550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161106056501550 is an abundant number, since it is smaller than the sum of its proper divisors (239195871821010).

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

161106056501550 is a wasteful number, since it uses less digits than its factorization.

161106056501550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622298 (or 622293 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 161106056501550 in words is "one hundred sixty-one trillion, one hundred six billion, fifty-six million, five hundred one thousand, five hundred fifty".