161618348160 has 96 divisors (see below), whose sum is σ = 558088378380. Its totient is φ = 43098224640.

The previous prime is 161618348159. The next prime is 161618348179. The reversal of 161618348160 is 61843816161.

161618348160 is a `hidden beast` number, since 1 + 6 + 161 + 8 + 3 + 481 + 6 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 130136233536 + 31482114624 = 360744^2 + 177432^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×161618348160² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 14023611 + ... + 14035130.

Almost surely, 2^161618348160 is an apocalyptic number.

161618348160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161618348160 is an abundant number, since it is smaller than the sum of its proper divisors (396470030220).

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

161618348160 is a wasteful number, since it uses less digits than its factorization.

161618348160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28058766 (or 28058751 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 161618348160 in words is "one hundred sixty-one billion, six hundred eighteen million, three hundred forty-eight thousand, one hundred sixty".