161711153118 has 96 divisors (see below), whose sum is σ = 379588809600. Its totient is φ = 49595796288.

The previous prime is 161711153083. The next prime is 161711153129. The reversal of 161711153118 is 811351117161.

It is a happy number.

161711153118 is a `hidden beast` number, since 1 + 6 + 1 + 7 + 111 + 531 + 1 + 8 = 666.

It is a super-2 number, since 2×161711153118² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

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, 1626496 + ... + 1723052.

It is an arithmetic number, because the mean of its divisors is an integer number (3954050100).

Almost surely, 2^161711153118 is an apocalyptic number.

161711153118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161711153118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189794404800).

161711153118 is an abundant number, since it is smaller than the sum of its proper divisors (217877656482).

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

161711153118 is a wasteful number, since it uses less digits than its factorization.

161711153118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96726 (or 96723 counting only the distinct ones).

The product of its digits is 5040, while the sum is 36.

The spelling of 161711153118 in words is "one hundred sixty-one billion, seven hundred eleven million, one hundred fifty-three thousand, one hundred eighteen".