181050997680 has 360 divisors, whose sum is σ = 720652460112. Its totient is φ = 40601852928.

The previous prime is 181050997651. The next prime is 181050997681. The reversal of 181050997680 is 86799050181.

It is a tau number, because it is divible by the number of its divisors (360).

It is not an unprimeable number, because it can be changed into a prime (181050997681) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1821427 + ... + 1918253.

Almost surely, 2^181050997680 is an apocalyptic number.

181050997680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181050997680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360326230056).

181050997680 is an abundant number, since it is smaller than the sum of its proper divisors (539601462432).

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

181050997680 is a wasteful number, since it uses less digits than its factorization.

181050997680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96913 (or 96897 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 54.

The spelling of 181050997680 in words is "one hundred eighty-one billion, fifty million, nine hundred ninety-seven thousand, six hundred eighty".