10599661243 has 4 divisors (see below), whose sum is σ = 10858189608. Its totient is φ = 10341132880.

The previous prime is 10599661201. The next prime is 10599661249. The reversal of 10599661243 is 34216699501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10599661243 is a prime.

It is a super-2 number, since 2×10599661243² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10599661193 and 10599661202.

It is not an unprimeable number, because it can be changed into a prime (10599661249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129264121 + ... + 129264202.

It is an arithmetic number, because the mean of its divisors is an integer number (2714547402).

Almost surely, 2^10599661243 is an apocalyptic number.

10599661243 is a deficient number, since it is larger than the sum of its proper divisors (258528365).

10599661243 is an equidigital number, since it uses as much as digits as its factorization.

10599661243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258528364.

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 10599661243 in words is "ten billion, five hundred ninety-nine million, six hundred sixty-one thousand, two hundred forty-three".