15534404253 has 12 divisors (see below), whose sum is σ = 22439699100. Its totient is φ = 10355754816.

The previous prime is 15534404243. The next prime is 15534404257. The reversal of 15534404253 is 35240443551.

It can be written as a sum of positive squares in 2 ways, for example, as 4306246884 + 11228157369 = 65622^2 + 105963^2 .

It is not a de Polignac number, because 15534404253 - 2¹⁰ = 15534403229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15534404257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263323 + ... + 316871.

It is an arithmetic number, because the mean of its divisors is an integer number (1869974925).

Almost surely, 2^15534404253 is an apocalyptic number.

It is an amenable number.

15534404253 is a deficient number, since it is larger than the sum of its proper divisors (6905294847).

15534404253 is a wasteful number, since it uses less digits than its factorization.

15534404253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85788 (or 85785 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

The spelling of 15534404253 in words is "fifteen billion, five hundred thirty-four million, four hundred four thousand, two hundred fifty-three".