10399207644 has 36 divisors (see below), whose sum is σ = 30042156144. Its totient is φ = 2971202112.

The previous prime is 10399207633. The next prime is 10399207657. The reversal of 10399207644 is 44670299301.

It is a happy number.

10399207644 is a `hidden beast` number, since 10 + 399 + 207 + 6 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 10399207644.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20633097 + ... + 20633600.

Almost surely, 2^10399207644 is an apocalyptic number.

10399207644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

10399207644 is an abundant number, since it is smaller than the sum of its proper divisors (19642948500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10399207644 is a wasteful number, since it uses less digits than its factorization.

10399207644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41266714 (or 41266709 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 10399207644 in words is "ten billion, three hundred ninety-nine million, two hundred seven thousand, six hundred forty-four".