13559744478 has 64 divisors (see below), whose sum is σ = 32676618240. Its totient is φ = 3664494432.

The previous prime is 13559744449. The next prime is 13559744483. The reversal of 13559744478 is 87444795531.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 503175 + ... + 529437.

It is an arithmetic number, because the mean of its divisors is an integer number (510572160).

Almost surely, 2^13559744478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13559744478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16338309120).

13559744478 is an abundant number, since it is smaller than the sum of its proper divisors (19116873762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13559744478 is a wasteful number, since it uses less digits than its factorization.

13559744478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26941.

The product of its digits is 16934400, while the sum is 57.

The spelling of 13559744478 in words is "thirteen billion, five hundred fifty-nine million, seven hundred forty-four thousand, four hundred seventy-eight".