5646555251 has 2 divisors, whose sum is σ = 5646555252. Its totient is φ = 5646555250.

The previous prime is 5646555241. The next prime is 5646555281. The reversal of 5646555251 is 1525556465.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5646555251 is a prime.

It is not a weakly prime, because it can be changed into another prime (5646555241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2823277625 + 2823277626.

It is an arithmetic number, because the mean of its divisors is an integer number (2823277626).

Almost surely, 2^5646555251 is an apocalyptic number.

5646555251 is a deficient number, since it is larger than the sum of its proper divisors (1).

5646555251 is an equidigital number, since it uses as much as digits as its factorization.

5646555251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900000, while the sum is 44.

The square root of 5646555251 is about 75143.5642686717. The cubic root of 5646555251 is about 1780.7154523037.

The spelling of 5646555251 in words is "five billion, six hundred forty-six million, five hundred fifty-five thousand, two hundred fifty-one".