1725861563 has 4 divisors (see below), whose sum is σ = 1729377048. Its totient is φ = 1722346080.

The previous prime is 1725861551. The next prime is 1725861581. The reversal of 1725861563 is 3651685271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3651685271 = 13 ⋅280898867.

It is a cyclic number.

It is not a de Polignac number, because 1725861563 - 2⁸ = 1725861307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1725861583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1757006 + ... + 1757987.

It is an arithmetic number, because the mean of its divisors is an integer number (432344262).

Almost surely, 2^1725861563 is an apocalyptic number.

1725861563 is a deficient number, since it is larger than the sum of its proper divisors (3515485).

1725861563 is an equidigital number, since it uses as much as digits as its factorization.

1725861563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515484.

The product of its digits is 302400, while the sum is 44.

The square root of 1725861563 is about 41543.4900194964. The cubic root of 1725861563 is about 1199.5047871001.

The spelling of 1725861563 in words is "one billion, seven hundred twenty-five million, eight hundred sixty-one thousand, five hundred sixty-three".