12544400535 has 16 divisors (see below), whose sum is σ = 20537810304. Its totient is φ = 6534757152.

The previous prime is 12544400527. The next prime is 12544400551. The reversal of 12544400535 is 53500444521.

It is not a de Polignac number, because 12544400535 - 2³ = 12544400527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12544400496 and 12544400505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9723697 + ... + 9724986.

It is an arithmetic number, because the mean of its divisors is an integer number (1283613144).

Almost surely, 2^12544400535 is an apocalyptic number.

12544400535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12544400535 is a deficient number, since it is larger than the sum of its proper divisors (7993409769).

12544400535 is a wasteful number, since it uses less digits than its factorization.

12544400535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19448734.

The product of its (nonzero) digits is 48000, while the sum is 33.

The spelling of 12544400535 in words is "twelve billion, five hundred forty-four million, four hundred thousand, five hundred thirty-five".