161757506200155 has 32 divisors (see below), whose sum is σ = 259945303887360. Its totient is φ = 85892969460480.

The previous prime is 161757506200151. The next prime is 161757506200177. The reversal of 161757506200155 is 551002605757161.

It is not a de Polignac number, because 161757506200155 - 2² = 161757506200151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161757506200098 and 161757506200107.

It is not an unprimeable number, because it can be changed into a prime (161757506200151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38470050 + ... + 42467160.

It is an arithmetic number, because the mean of its divisors is an integer number (8123290746480).

Almost surely, 2^{161757506200155} is an apocalyptic number.

161757506200155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161757506200155 is a deficient number, since it is larger than the sum of its proper divisors (98187797687205).

161757506200155 is a wasteful number, since it uses less digits than its factorization.

161757506200155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4008931.

The product of its (nonzero) digits is 2205000, while the sum is 51.

The spelling of 161757506200155 in words is "one hundred sixty-one trillion, seven hundred fifty-seven billion, five hundred six million, two hundred thousand, one hundred fifty-five".