13531878442 has 32 divisors (see below), whose sum is σ = 21396830400. Its totient is φ = 6409603200.

The previous prime is 13531878403. The next prime is 13531878461. The reversal of 13531878442 is 24487813531.

It is a super-3 number, since 3×13531878442³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 13531878392 and 13531878401.

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, 666217 + ... + 686227.

It is an arithmetic number, because the mean of its divisors is an integer number (668650950).

Almost surely, 2^13531878442 is an apocalyptic number.

13531878442 is a deficient number, since it is larger than the sum of its proper divisors (7864951958).

13531878442 is a wasteful number, since it uses less digits than its factorization.

13531878442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20262.

The product of its digits is 645120, while the sum is 46.

The spelling of 13531878442 in words is "thirteen billion, five hundred thirty-one million, eight hundred seventy-eight thousand, four hundred forty-two".