2750405621 has 2 divisors, whose sum is σ = 2750405622. Its totient is φ = 2750405620.

The previous prime is 2750405587. The next prime is 2750405633. The reversal of 2750405621 is 1265040572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2653383121 + 97022500 = 51511^2 + 9850^2 .

It is a cyclic number.

It is not a de Polignac number, because 2750405621 - 2²² = 2746211317 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2750405641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1375202810 + 1375202811.

It is an arithmetic number, because the mean of its divisors is an integer number (1375202811).

Almost surely, 2^2750405621 is an apocalyptic number.

It is an amenable number.

2750405621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2750405621 is an equidigital number, since it uses as much as digits as its factorization.

2750405621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 2750405621 is about 52444.3097103966. The cubic root of 2750405621 is about 1401.0885447289.

The spelling of 2750405621 in words is "two billion, seven hundred fifty million, four hundred five thousand, six hundred twenty-one".