15545822854551 has 48 divisors (see below), whose sum is σ = 22846470646272. Its totient is φ = 9395668275840.

The previous prime is 15545822854501. The next prime is 15545822854607.

It is a happy number.

15545822854551 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 15545822854551 - 2¹⁵ = 15545822821783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15545822854501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 197727090 + ... + 197805696.

It is an arithmetic number, because the mean of its divisors is an integer number (475968138464).

Almost surely, 2^{15545822854551} is an apocalyptic number.

15545822854551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15545822854551 is a deficient number, since it is larger than the sum of its proper divisors (7300647791721).

15545822854551 is a wasteful number, since it uses less digits than its factorization.

15545822854551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80132 (or 80121 counting only the distinct ones).

The product of its digits is 64000000, while the sum is 60.

The spelling of 15545822854551 in words is "fifteen trillion, five hundred forty-five billion, eight hundred twenty-two million, eight hundred fifty-four thousand, five hundred fifty-one".