10999208725 has 12 divisors (see below), whose sum is σ = 13665213540. Its totient is φ = 8782467200.

The previous prime is 10999208687. The next prime is 10999208747. The reversal of 10999208725 is 52780299901.

It can be written as a sum of positive squares in 6 ways, for example, as 2388667876 + 8610540849 = 48874^2 + 92793^2 .

It is not a de Polignac number, because 10999208725 - 2²³ = 10990820117 is a prime.

It is a super-2 number, since 2×10999208725² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 409210 + ... + 435259.

It is an arithmetic number, because the mean of its divisors is an integer number (1138767795).

Almost surely, 2^10999208725 is an apocalyptic number.

It is an amenable number.

10999208725 is a deficient number, since it is larger than the sum of its proper divisors (2666004815).

10999208725 is an equidigital number, since it uses as much as digits as its factorization.

10999208725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845000 (or 844995 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 52.

The spelling of 10999208725 in words is "ten billion, nine hundred ninety-nine million, two hundred eight thousand, seven hundred twenty-five".