1825657489 has 8 divisors (see below), whose sum is σ = 1937420640. Its totient is φ = 1714380096.

The previous prime is 1825657439. The next prime is 1825657507. The reversal of 1825657489 is 9847565281.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1825657489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1825657439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113679 + ... + 128740.

It is an arithmetic number, because the mean of its divisors is an integer number (242177580).

Almost surely, 2^1825657489 is an apocalyptic number.

It is an amenable number.

1825657489 is a deficient number, since it is larger than the sum of its proper divisors (111763151).

1825657489 is a wasteful number, since it uses less digits than its factorization.

1825657489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242879.

The product of its digits is 4838400, while the sum is 55.

The square root of 1825657489 is about 42727.7133603005. The cubic root of 1825657489 is about 1222.1929314930.

The spelling of 1825657489 in words is "one billion, eight hundred twenty-five million, six hundred fifty-seven thousand, four hundred eighty-nine".