10399207645 has 8 divisors (see below), whose sum is σ = 12714503256. Its totient is φ = 8162396736.

The previous prime is 10399207633. The next prime is 10399207657. The reversal of 10399207645 is 54670299301.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (10399207633) and next prime (10399207657).

It can be written as a sum of positive squares in 4 ways, for example, as 3322023769 + 7077183876 = 57637^2 + 84126^2 .

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 10399207645 - 2²³ = 10390819037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10399207595 and 10399207604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19620882 + ... + 19621411.

It is an arithmetic number, because the mean of its divisors is an integer number (1589312907).

Almost surely, 2^10399207645 is an apocalyptic number.

It is an amenable number.

10399207645 is a deficient number, since it is larger than the sum of its proper divisors (2315295611).

10399207645 is an equidigital number, since it uses as much as digits as its factorization.

10399207645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39242351.

The product of its (nonzero) digits is 408240, while the sum is 46.

The spelling of 10399207645 in words is "ten billion, three hundred ninety-nine million, two hundred seven thousand, six hundred forty-five".