5551600512721 has 2 divisors, whose sum is σ = 5551600512722. Its totient is φ = 5551600512720.

The previous prime is 5551600512691. The next prime is 5551600512793. The reversal of 5551600512721 is 1272150061555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4278113089600 + 1273487423121 = 2068360^2 + 1128489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5551600512721 is a prime.

It is not a weakly prime, because it can be changed into another prime (5551600510721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2775800256360 + 2775800256361.

It is an arithmetic number, because the mean of its divisors is an integer number (2775800256361).

Almost surely, 2^{5551600512721} is an apocalyptic number.

It is an amenable number.

5551600512721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5551600512721 is an equidigital number, since it uses as much as digits as its factorization.

5551600512721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105000, while the sum is 40.

The spelling of 5551600512721 in words is "five trillion, five hundred fifty-one billion, six hundred million, five hundred twelve thousand, seven hundred twenty-one".