15541814551 has 2 divisors, whose sum is σ = 15541814552. Its totient is φ = 15541814550.

The previous prime is 15541814539. The next prime is 15541814569.

15541814551 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15541814551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15541814501) 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, 7770907275 + 7770907276.

It is an arithmetic number, because the mean of its divisors is an integer number (7770907276).

Almost surely, 2^15541814551 is an apocalyptic number.

15541814551 is a deficient number, since it is larger than the sum of its proper divisors (1).

15541814551 is an equidigital number, since it uses as much as digits as its factorization.

15541814551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80000, while the sum is 40.

The spelling of 15541814551 in words is "fifteen billion, five hundred forty-one million, eight hundred fourteen thousand, five hundred fifty-one".