2725437326221 has 2 divisors, whose sum is σ = 2725437326222. Its totient is φ = 2725437326220.

The previous prime is 2725437326197. The next prime is 2725437326273. The reversal of 2725437326221 is 1226237345272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2228780268100 + 496657058121 = 1492910^2 + 704739^2 .

It is a cyclic number.

It is not a de Polignac number, because 2725437326221 - 2²⁵ = 2725403771789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2725437321221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1362718663110 + 1362718663111.

It is an arithmetic number, because the mean of its divisors is an integer number (1362718663111).

Almost surely, 2^{2725437326221} is an apocalyptic number.

It is an amenable number.

2725437326221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2725437326221 is an equidigital number, since it uses as much as digits as its factorization.

2725437326221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 46.

The spelling of 2725437326221 in words is "two trillion, seven hundred twenty-five billion, four hundred thirty-seven million, three hundred twenty-six thousand, two hundred twenty-one".