15540403454 has 16 divisors (see below), whose sum is σ = 23988324096. Its totient is φ = 7546819800.

The previous prime is 15540403453. The next prime is 15540403457. The reversal of 15540403454 is 45430404551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15540403453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 618692 + ... + 643319.

It is an arithmetic number, because the mean of its divisors is an integer number (1499270256).

Almost surely, 2^15540403454 is an apocalyptic number.

15540403454 is a deficient number, since it is larger than the sum of its proper divisors (8447920642).

15540403454 is a wasteful number, since it uses less digits than its factorization.

15540403454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262191.

The product of its (nonzero) digits is 96000, while the sum is 35.

The spelling of 15540403454 in words is "fifteen billion, five hundred forty million, four hundred three thousand, four hundred fifty-four".