15540440054 has 16 divisors (see below), whose sum is σ = 23585839200. Its totient is φ = 7678592064.

The previous prime is 15540439991. The next prime is 15540440057. The reversal of 15540440054 is 45004404551.

It is a self number, because there is not a number n which added to its sum of digits gives 15540440054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15540440057) 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 7 ways as a sum of consecutive naturals, for example, 305132 + ... + 352400.

It is an arithmetic number, because the mean of its divisors is an integer number (1474114950).

Almost surely, 2^15540440054 is an apocalyptic number.

15540440054 is a deficient number, since it is larger than the sum of its proper divisors (8045399146).

15540440054 is a wasteful number, since it uses less digits than its factorization.

15540440054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49207.

The product of its (nonzero) digits is 32000, while the sum is 32.

The spelling of 15540440054 in words is "fifteen billion, five hundred forty million, four hundred forty thousand, fifty-four".