181016243664 has 40 divisors (see below), whose sum is σ = 470208883872. Its totient is φ = 60005381760.

The previous prime is 181016243663. The next prime is 181016243671. The reversal of 181016243664 is 466342610181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181016243663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10408914 + ... + 10426289.

Almost surely, 2^181016243664 is an apocalyptic number.

It is an amenable number.

181016243664 is an abundant number, since it is smaller than the sum of its proper divisors (289192640208).

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

181016243664 is a wasteful number, since it uses less digits than its factorization.

181016243664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20835395 (or 20835389 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 181016243664 in words is "one hundred eighty-one billion, sixteen million, two hundred forty-three thousand, six hundred sixty-four".