161606444055450 has 48 divisors (see below), whose sum is σ = 402504084268416. Its totient is φ = 42910094435200.

The previous prime is 161606444055449. The next prime is 161606444055451. The reversal of 161606444055450 is 54550444606161.

It is an interprime number because it is at equal distance from previous prime (161606444055449) and next prime (161606444055451).

It is a super-2 number, since 2×161606444055450² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161606444055393 and 161606444055402.

It is not an unprimeable number, because it can be changed into a prime (161606444055451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2311931346 + ... + 2312001245.

It is an arithmetic number, because the mean of its divisors is an integer number (8385501755592).

Almost surely, 2^{161606444055450} is an apocalyptic number.

161606444055450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161606444055450 is an abundant number, since it is smaller than the sum of its proper divisors (240897640212966).

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

161606444055450 is a wasteful number, since it uses less digits than its factorization.

161606444055450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4623932839 (or 4623932834 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 51.

The spelling of 161606444055450 in words is "one hundred sixty-one trillion, six hundred six billion, four hundred forty-four million, fifty-five thousand, four hundred fifty".