161188217355 has 16 divisors (see below), whose sum is σ = 281346706944. Its totient is φ = 78151862880.

The previous prime is 161188217321. The next prime is 161188217371. The reversal of 161188217355 is 553712881161.

It is a happy number.

It is not a de Polignac number, because 161188217355 - 2⁶ = 161188217291 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488448979 + ... + 488449308.

It is an arithmetic number, because the mean of its divisors is an integer number (17584169184).

Almost surely, 2^161188217355 is an apocalyptic number.

161188217355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161188217355 is a deficient number, since it is larger than the sum of its proper divisors (120158489589).

161188217355 is a wasteful number, since it uses less digits than its factorization.

161188217355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976898306.

The product of its digits is 403200, while the sum is 48.

The spelling of 161188217355 in words is "one hundred sixty-one billion, one hundred eighty-eight million, two hundred seventeen thousand, three hundred fifty-five".