2015543440454 has 64 divisors (see below), whose sum is σ = 3225142656000. Its totient is φ = 942580459392.

The previous prime is 2015543440423. The next prime is 2015543440459. The reversal of 2015543440454 is 4540443455102.

It is a super-2 number, since 2×2015543440454² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015543440459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1639985912 + ... + 1639987140.

It is an arithmetic number, because the mean of its divisors is an integer number (50392854000).

Almost surely, 2^{2015543440454} is an apocalyptic number.

2015543440454 is a deficient number, since it is larger than the sum of its proper divisors (1209599215546).

2015543440454 is a wasteful number, since it uses less digits than its factorization.

2015543440454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3029.

The product of its (nonzero) digits is 768000, while the sum is 41.

Adding to 2015543440454 its reverse (4540443455102), we get a palindrome (6555986895556).

The spelling of 2015543440454 in words is "two trillion, fifteen billion, five hundred forty-three million, four hundred forty thousand, four hundred fifty-four".