15506636543 has 2 divisors, whose sum is σ = 15506636544. Its totient is φ = 15506636542.

The previous prime is 15506636533. The next prime is 15506636557. The reversal of 15506636543 is 34563660551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15506636543 - 2¹⁶ = 15506571007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15506636494 and 15506636503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15506636503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7753318271 + 7753318272.

It is an arithmetic number, because the mean of its divisors is an integer number (7753318272).

Almost surely, 2^15506636543 is an apocalyptic number.

15506636543 is a deficient number, since it is larger than the sum of its proper divisors (1).

15506636543 is an equidigital number, since it uses as much as digits as its factorization.

15506636543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972000, while the sum is 44.

The spelling of 15506636543 in words is "fifteen billion, five hundred six million, six hundred thirty-six thousand, five hundred forty-three".