15545455911 has 24 divisors (see below), whose sum is σ = 23780643120. Its totient is φ = 9751862016.

The previous prime is 15545455883. The next prime is 15545455969. The reversal of 15545455911 is 11955454551.

15545455911 is a `hidden beast` number, since 1 + 5 + 5 + 4 + 54 + 5 + 591 + 1 = 666.

It is not a de Polignac number, because 15545455911 - 2⁹ = 15545455399 is a prime.

It is a super-2 number, since 2×15545455911² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15545455711) 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 in 23 ways as a sum of consecutive naturals, for example, 959385 + ... + 975453.

It is an arithmetic number, because the mean of its divisors is an integer number (990860130).

Almost surely, 2^15545455911 is an apocalyptic number.

15545455911 is a deficient number, since it is larger than the sum of its proper divisors (8235187209).

15545455911 is a wasteful number, since it uses less digits than its factorization.

15545455911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22415 (or 22412 counting only the distinct ones).

The product of its digits is 450000, while the sum is 45.

The spelling of 15545455911 in words is "fifteen billion, five hundred forty-five million, four hundred fifty-five thousand, nine hundred eleven".