540870522721 has 3 divisors (see below), whose sum is σ = 540871258161. Its totient is φ = 540869787282.

The previous prime is 540870522671. The next prime is 540870522733. The reversal of 540870522721 is 127225078045.

The square root of 540870522721 is 735439.

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 is a de Polignac number, because none of the positive numbers 2^k-540870522721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540870522121) 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, 367720 + ... + 1103158.

It is an arithmetic number, because the mean of its divisors is an integer number (180290419387).

Almost surely, 2^540870522721 is an apocalyptic number.

540870522721 is the 735439-th square number.

540870522721 is the 367720-th centered octagonal number.

It is an amenable number.

540870522721 is a deficient number, since it is larger than the sum of its proper divisors (735440).

540870522721 is an frugal number, since it uses more digits than its factorization.

540870522721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470878 (or 735439 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 43.

The spelling of 540870522721 in words is "five hundred forty billion, eight hundred seventy million, five hundred twenty-two thousand, seven hundred twenty-one".