161043451488 has 72 divisors (see below), whose sum is σ = 472740480576. Its totient is φ = 51949497600.

The previous prime is 161043451469. The next prime is 161043451493. The reversal of 161043451488 is 884154340161.

161043451488 is a `hidden beast` number, since 1 + 6 + 10 + 43 + 4 + 514 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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, 9010083 + ... + 9027938.

It is an arithmetic number, because the mean of its divisors is an integer number (6565840008).

Almost surely, 2^161043451488 is an apocalyptic number.

161043451488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161043451488 is an abundant number, since it is smaller than the sum of its proper divisors (311697029088).

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

161043451488 is a wasteful number, since it uses less digits than its factorization.

161043451488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18038068 (or 18038057 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 161043451488 in words is "one hundred sixty-one billion, forty-three million, four hundred fifty-one thousand, four hundred eighty-eight".