45708256721 has 2 divisors, whose sum is σ = 45708256722. Its totient is φ = 45708256720.

The previous prime is 45708256679. The next prime is 45708256777. The reversal of 45708256721 is 12765280754.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31413663121 + 14294593600 = 177239^2 + 119560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45708256721 is a prime.

It is not a weakly prime, because it can be changed into another prime (45708256021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22854128360 + 22854128361.

It is an arithmetic number, because the mean of its divisors is an integer number (22854128361).

Almost surely, 2^45708256721 is an apocalyptic number.

It is an amenable number.

45708256721 is a deficient number, since it is larger than the sum of its proper divisors (1).

45708256721 is an equidigital number, since it uses as much as digits as its factorization.

45708256721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 940800, while the sum is 47.

The spelling of 45708256721 in words is "forty-five billion, seven hundred eight million, two hundred fifty-six thousand, seven hundred twenty-one".