52726001621 has 4 divisors (see below), whose sum is σ = 52726588992. Its totient is φ = 52725414252.

The previous prime is 52726001597. The next prime is 52726001633. The reversal of 52726001621 is 12610062725.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 52726001621 - 2¹⁸ = 52725739477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52726001641) 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, 127805 + ... + 348978.

It is an arithmetic number, because the mean of its divisors is an integer number (13181647248).

Almost surely, 2^52726001621 is an apocalyptic number.

It is an amenable number.

52726001621 is a deficient number, since it is larger than the sum of its proper divisors (587371).

52726001621 is a wasteful number, since it uses less digits than its factorization.

52726001621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587370.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 52726001621 in words is "fifty-two billion, seven hundred twenty-six million, one thousand, six hundred twenty-one".