15540434527 has 2 divisors, whose sum is σ = 15540434528. Its totient is φ = 15540434526.

The previous prime is 15540434453. The next prime is 15540434563. The reversal of 15540434527 is 72543404551.

It is a strong prime.

It is an emirp because it is prime and its reverse (72543404551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15540434527 - 2¹⁵ = 15540401759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15540434527.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15540434597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7770217263 + 7770217264.

It is an arithmetic number, because the mean of its divisors is an integer number (7770217264).

Almost surely, 2^15540434527 is an apocalyptic number.

15540434527 is a deficient number, since it is larger than the sum of its proper divisors (1).

15540434527 is an equidigital number, since it uses as much as digits as its factorization.

15540434527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336000, while the sum is 40.

The spelling of 15540434527 in words is "fifteen billion, five hundred forty million, four hundred thirty-four thousand, five hundred twenty-seven".