10399340544 has 72 divisors (see below), whose sum is σ = 27746131140. Its totient is φ = 3463782400.

The previous prime is 10399340537. The next prime is 10399340561. The reversal of 10399340544 is 44504399301.

It is a junction number, because it is equal to n+sod(n) for n = 10399340496 and 10399340505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7992694 + ... + 7993994.

Almost surely, 2^10399340544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10399340544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13873065570).

10399340544 is an abundant number, since it is smaller than the sum of its proper divisors (17346790596).

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

10399340544 is an frugal number, since it uses more digits than its factorization.

10399340544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2627 (or 1306 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 10399340544 in words is "ten billion, three hundred ninety-nine million, three hundred forty thousand, five hundred forty-four".