1725648857 has 16 divisors (see below), whose sum is σ = 1810512000. Its totient is φ = 1642591104.

The previous prime is 1725648839. The next prime is 1725648893. The reversal of 1725648857 is 7588465271.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1725648857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1725648799 and 1725648808.

It is not an unprimeable number, because it can be changed into a prime (1725641857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1132298 + ... + 1133820.

It is an arithmetic number, because the mean of its divisors is an integer number (113157000).

Almost surely, 2^1725648857 is an apocalyptic number.

It is an amenable number.

1725648857 is a deficient number, since it is larger than the sum of its proper divisors (84863143).

1725648857 is a wasteful number, since it uses less digits than its factorization.

1725648857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2080.

The product of its digits is 3763200, while the sum is 53.

The square root of 1725648857 is about 41540.9299005210. The cubic root of 1725648857 is about 1199.4555069120.

The spelling of 1725648857 in words is "one billion, seven hundred twenty-five million, six hundred forty-eight thousand, eight hundred fifty-seven".