180721867425 has 96 divisors (see below), whose sum is σ = 338138357760. Its totient is φ = 84402240000.

The previous prime is 180721867423. The next prime is 180721867433. The reversal of 180721867425 is 524768127081.

It is a happy number.

180721867425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 180721867425 - 2¹ = 180721867423 is a prime.

It is a super-2 number, since 2×180721867425² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (180721867423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2638360 + ... + 2705990.

It is an arithmetic number, because the mean of its divisors is an integer number (3522274560).

Almost surely, 2^180721867425 is an apocalyptic number.

180721867425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

180721867425 is a deficient number, since it is larger than the sum of its proper divisors (157416490335).

180721867425 is a wasteful number, since it uses less digits than its factorization.

180721867425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67775 (or 67770 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 51.

The spelling of 180721867425 in words is "one hundred eighty billion, seven hundred twenty-one million, eight hundred sixty-seven thousand, four hundred twenty-five".