15823970249 has 2 divisors, whose sum is σ = 15823970250. Its totient is φ = 15823970248.

The previous prime is 15823970207. The next prime is 15823970329. The reversal of 15823970249 is 94207932851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11630112649 + 4193857600 = 107843^2 + 64760^2 .

It is a cyclic number.

It is not a de Polignac number, because 15823970249 - 2¹² = 15823966153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15823970197 and 15823970206.

It is not a weakly prime, because it can be changed into another prime (15823975249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7911985124 + 7911985125.

It is an arithmetic number, because the mean of its divisors is an integer number (7911985125).

Almost surely, 2^15823970249 is an apocalyptic number.

It is an amenable number.

15823970249 is a deficient number, since it is larger than the sum of its proper divisors (1).

15823970249 is an equidigital number, since it uses as much as digits as its factorization.

15823970249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 15823970249 in words is "fifteen billion, eight hundred twenty-three million, nine hundred seventy thousand, two hundred forty-nine".