54400011531 has 16 divisors (see below), whose sum is σ = 72639309600. Its totient is φ = 36213731840.

The previous prime is 54400011439. The next prime is 54400011553. The reversal of 54400011531 is 13511000445.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 54400011531 - 2⁷ = 54400011403 is a prime.

It is a super-2 number, since 2×54400011531² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (54400011581) 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 15 ways as a sum of consecutive naturals, for example, 12302701 + ... + 12307121.

It is an arithmetic number, because the mean of its divisors is an integer number (4539956850).

Almost surely, 2^54400011531 is an apocalyptic number.

54400011531 is a deficient number, since it is larger than the sum of its proper divisors (18239298069).

54400011531 is a wasteful number, since it uses less digits than its factorization.

54400011531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9486.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 54400011531 its reverse (13511000445), we get a palindrome (67911011976).

The spelling of 54400011531 in words is "fifty-four billion, four hundred million, eleven thousand, five hundred thirty-one".