161001005516055 has 12 divisors (see below), whose sum is σ = 279068409561240. Its totient is φ = 85867202941872.

The previous prime is 161001005516041. The next prime is 161001005516063. The reversal of 161001005516055 is 550615500100161.

It is a happy number.

It is not a de Polignac number, because 161001005516055 - 2⁵ = 161001005516023 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1788900061245 + ... + 1788900061334.

It is an arithmetic number, because the mean of its divisors is an integer number (23255700796770).

Almost surely, 2^{161001005516055} is an apocalyptic number.

161001005516055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161001005516055 is a deficient number, since it is larger than the sum of its proper divisors (118067404045185).

161001005516055 is a wasteful number, since it uses less digits than its factorization.

161001005516055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3577800122590 (or 3577800122587 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 161001005516055 in words is "one hundred sixty-one trillion, one billion, five million, five hundred sixteen thousand, fifty-five".