15543816053 has 16 divisors (see below), whose sum is σ = 16300838400. Its totient is φ = 14802782400.

The previous prime is 15543816011. The next prime is 15543816059. The reversal of 15543816053 is 35061834551.

It is a cyclic number.

It is not a de Polignac number, because 15543816053 - 2²⁴ = 15527038837 is a prime.

It is a super-2 number, since 2×15543816053² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15543816053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15543816059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 693878 + ... + 715928.

It is an arithmetic number, because the mean of its divisors is an integer number (1018802400).

Almost surely, 2^15543816053 is an apocalyptic number.

It is an amenable number.

15543816053 is a deficient number, since it is larger than the sum of its proper divisors (757022347).

15543816053 is a wasteful number, since it uses less digits than its factorization.

15543816053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22412.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 15543816053 in words is "fifteen billion, five hundred forty-three million, eight hundred sixteen thousand, fifty-three".