13985111536 has 80 divisors (see below), whose sum is σ = 30699427968. Its totient is φ = 6116140800.

The previous prime is 13985111533. The next prime is 13985111573. The reversal of 13985111536 is 63511158931.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 13985111492 and 13985111501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13985111533) 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, 493266 + ... + 520846.

Almost surely, 2^13985111536 is an apocalyptic number.

13985111536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13985111536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15349713984).

13985111536 is an abundant number, since it is smaller than the sum of its proper divisors (16714316432).

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

13985111536 is a wasteful number, since it uses less digits than its factorization.

13985111536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27710 (or 27704 counting only the distinct ones).

The product of its digits is 97200, while the sum is 43.

It can be divided in two parts, 13985 and 111536, that added together give a palindrome (125521).

The spelling of 13985111536 in words is "thirteen billion, nine hundred eighty-five million, one hundred eleven thousand, five hundred thirty-six".