161540745280 has 56 divisors (see below), whose sum is σ = 384703149312. Its totient is φ = 64610545152.

The previous prime is 161540745263. The next prime is 161540745287. The reversal of 161540745280 is 82547045161.

161540745280 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161540745287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7029489 + ... + 7052431.

Almost surely, 2^161540745280 is an apocalyptic number.

161540745280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161540745280 is an abundant number, since it is smaller than the sum of its proper divisors (223162404032).

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

161540745280 is a wasteful number, since it uses less digits than its factorization.

161540745280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44963 (or 44953 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 161540745280 in words is "one hundred sixty-one billion, five hundred forty million, seven hundred forty-five thousand, two hundred eighty".