31725489989 has 8 divisors (see below), whose sum is σ = 33406560000. Its totient is φ = 30045550752.

The previous prime is 31725489973. The next prime is 31725490021. The reversal of 31725489989 is 98998452713.

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

It is a cyclic number.

It is not a de Polignac number, because 31725489989 - 2⁴ = 31725489973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31725489949) 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, 224789 + ... + 337610.

It is an arithmetic number, because the mean of its divisors is an integer number (4175820000).

Almost surely, 2^31725489989 is an apocalyptic number.

It is an amenable number.

31725489989 is a deficient number, since it is larger than the sum of its proper divisors (1681070011).

31725489989 is a wasteful number, since it uses less digits than its factorization.

31725489989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565387.

The product of its digits is 39191040, while the sum is 65.

The spelling of 31725489989 in words is "thirty-one billion, seven hundred twenty-five million, four hundred eighty-nine thousand, nine hundred eighty-nine".