10399547877889 has 3 divisors (see below), whose sum is σ = 10399551102723. Its totient is φ = 10399544653056.

The previous prime is 10399547877863. The next prime is 10399547877893. The reversal of 10399547877889 is 98877874599301.

The square root of 10399547877889 is 3224833.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 10042909593025 + 356638284864 = 3169055^2 + 597192^2 .

It is not a de Polignac number, because 10399547877889 - 2²³ = 10399539489281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10399547877289) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1612417 + ... + 4837249.

It is an arithmetic number, because the mean of its divisors is an integer number (3466517034241).

Almost surely, 2^{10399547877889} is an apocalyptic number.

10399547877889 is the 3224833-rd square number.

10399547877889 is the 1612417-th centered octagonal number.

It is an amenable number.

10399547877889 is a deficient number, since it is larger than the sum of its proper divisors (3224834).

10399547877889 is an frugal number, since it uses more digits than its factorization.

10399547877889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6449666 (or 3224833 counting only the distinct ones).

The product of its (nonzero) digits is 7681443840, while the sum is 85.

The spelling of 10399547877889 in words is "ten trillion, three hundred ninety-nine billion, five hundred forty-seven million, eight hundred seventy-seven thousand, eight hundred eighty-nine".