155132126720561 has 8 divisors (see below), whose sum is σ = 161896871513664. Its totient is φ = 148369037737360.

The previous prime is 155132126720537. The next prime is 155132126720629. The reversal of 155132126720561 is 165027621231551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155132126720561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155132126726561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413761010 + ... + 414135771.

It is an arithmetic number, because the mean of its divisors is an integer number (20237108939208).

Almost surely, 2^{155132126720561} is an apocalyptic number.

It is an amenable number.

155132126720561 is a deficient number, since it is larger than the sum of its proper divisors (6764744793103).

155132126720561 is an equidigital number, since it uses as much as digits as its factorization.

155132126720561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827904951.

The product of its (nonzero) digits is 756000, while the sum is 47.

The spelling of 155132126720561 in words is "one hundred fifty-five trillion, one hundred thirty-two billion, one hundred twenty-six million, seven hundred twenty thousand, five hundred sixty-one".