5725121657 has 2 divisors, whose sum is σ = 5725121658. Its totient is φ = 5725121656.

The previous prime is 5725121641. The next prime is 5725121687. The reversal of 5725121657 is 7561215275.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3243985936 + 2481135721 = 56956^2 + 49811^2 .

It is a cyclic number.

It is not a de Polignac number, because 5725121657 - 2⁴ = 5725121641 is a prime.

It is not a weakly prime, because it can be changed into another prime (5725121617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2862560828 + 2862560829.

It is an arithmetic number, because the mean of its divisors is an integer number (2862560829).

Almost surely, 2^5725121657 is an apocalyptic number.

It is an amenable number.

5725121657 is a deficient number, since it is larger than the sum of its proper divisors (1).

5725121657 is an equidigital number, since it uses as much as digits as its factorization.

5725121657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 147000, while the sum is 41.

The square root of 5725121657 is about 75664.5336799217. The cubic root of 5725121657 is about 1788.9364235080.

The spelling of 5725121657 in words is "five billion, seven hundred twenty-five million, one hundred twenty-one thousand, six hundred fifty-seven".