2720280745829 has 2 divisors, whose sum is σ = 2720280745830. Its totient is φ = 2720280745828.

The previous prime is 2720280745823. The next prime is 2720280745879. The reversal of 2720280745829 is 9285470820272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2288760508225 + 431520237604 = 1512865^2 + 656902^2 .

It is a cyclic number.

It is not a de Polignac number, because 2720280745829 - 2⁸ = 2720280745573 is a prime.

It is a super-2 number, since 2×2720280745829² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2720280745823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360140372914 + 1360140372915.

It is an arithmetic number, because the mean of its divisors is an integer number (1360140372915).

Almost surely, 2^{2720280745829} is an apocalyptic number.

It is an amenable number.

2720280745829 is a deficient number, since it is larger than the sum of its proper divisors (1).

2720280745829 is an equidigital number, since it uses as much as digits as its factorization.

2720280745829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 2720280745829 in words is "two trillion, seven hundred twenty billion, two hundred eighty million, seven hundred forty-five thousand, eight hundred twenty-nine".