10389252785 has 4 divisors (see below), whose sum is σ = 12467103348. Its totient is φ = 8311402224.

The previous prime is 10389252781. The next prime is 10389252787. The reversal of 10389252785 is 58725298301.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7898943376 + 2490309409 = 88876^2 + 49903^2 .

It is a cyclic number.

It is not a de Polignac number, because 10389252785 - 2² = 10389252781 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10389252781) 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, 1038925274 + ... + 1038925283.

It is an arithmetic number, because the mean of its divisors is an integer number (3116775837).

Almost surely, 2^10389252785 is an apocalyptic number.

It is an amenable number.

10389252785 is a deficient number, since it is larger than the sum of its proper divisors (2077850563).

10389252785 is an equidigital number, since it uses as much as digits as its factorization.

10389252785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077850562.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 10389252785 in words is "ten billion, three hundred eighty-nine million, two hundred fifty-two thousand, seven hundred eighty-five".