2724403761421 has 2 divisors, whose sum is σ = 2724403761422. Its totient is φ = 2724403761420.

The previous prime is 2724403761341. The next prime is 2724403761461. The reversal of 2724403761421 is 1241673044272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1688476743396 + 1035927018025 = 1299414^2 + 1017805^2 .

It is a cyclic number.

It is not a de Polignac number, because 2724403761421 - 2¹⁵ = 2724403728653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2724403761461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1362201880710 + 1362201880711.

It is an arithmetic number, because the mean of its divisors is an integer number (1362201880711).

Almost surely, 2^{2724403761421} is an apocalyptic number.

It is an amenable number.

2724403761421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2724403761421 is an equidigital number, since it uses as much as digits as its factorization.

2724403761421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 43.

The spelling of 2724403761421 in words is "two trillion, seven hundred twenty-four billion, four hundred three million, seven hundred sixty-one thousand, four hundred twenty-one".