181585740552 has 32 divisors (see below), whose sum is σ = 453976216800. Its totient is φ = 60526998144.

The previous prime is 181585740527. The next prime is 181585740563. The reversal of 181585740552 is 255047585181.

It is a junction number, because it is equal to n+sod(n) for n = 181585740495 and 181585740504.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1171668 + ... + 1317564.

It is an arithmetic number, because the mean of its divisors is an integer number (14186756775).

Almost surely, 2^181585740552 is an apocalyptic number.

181585740552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181585740552 is an abundant number, since it is smaller than the sum of its proper divisors (272390476248).

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

181585740552 is a wasteful number, since it uses less digits than its factorization.

181585740552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197765 (or 197761 counting only the distinct ones).

The product of its (nonzero) digits is 2240000, while the sum is 51.

The spelling of 181585740552 in words is "one hundred eighty-one billion, five hundred eighty-five million, seven hundred forty thousand, five hundred fifty-two".