180749254838521 has 4 divisors (see below), whose sum is σ = 180749283749200. Its totient is φ = 180749225927844.

The previous prime is 180749254838473. The next prime is 180749254838587. The reversal of 180749254838521 is 125838452947081.

180749254838521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 180749254838521 - 2³¹ = 180747107354873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180749254838821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 738951 + ... + 19027468.

It is an arithmetic number, because the mean of its divisors is an integer number (45187320937300).

Almost surely, 2^{180749254838521} is an apocalyptic number.

It is an amenable number.

180749254838521 is a deficient number, since it is larger than the sum of its proper divisors (28910679).

180749254838521 is an equidigital number, since it uses as much as digits as its factorization.

180749254838521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28910678.

The product of its (nonzero) digits is 154828800, while the sum is 67.

The spelling of 180749254838521 in words is "one hundred eighty trillion, seven hundred forty-nine billion, two hundred fifty-four million, eight hundred thirty-eight thousand, five hundred twenty-one".