18152959475641 has 3 divisors (see below), whose sum is σ = 18152963736271. Its totient is φ = 18152955215012.

The previous prime is 18152959475627. The next prime is 18152959475657. The reversal of 18152959475641 is 14657495925181.

The square root of 18152959475641 is 4260629.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 15401142976041 + 2751816499600 = 3924429^2 + 1658860^2 .

It is not a de Polignac number, because 18152959475641 - 2¹⁹ = 18152958951353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18152959445641) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2130315 + ... + 6390943.

Almost surely, 2^{18152959475641} is an apocalyptic number.

18152959475641 is the 4260629-th square number.

18152959475641 is the 2130315-th centered octagonal number.

It is an amenable number.

18152959475641 is a deficient number, since it is larger than the sum of its proper divisors (4260630).

18152959475641 is an frugal number, since it uses more digits than its factorization.

18152959475641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8521258 (or 4260629 counting only the distinct ones).

The product of its digits is 108864000, while the sum is 67.

The spelling of 18152959475641 in words is "eighteen trillion, one hundred fifty-two billion, nine hundred fifty-nine million, four hundred seventy-five thousand, six hundred forty-one".