13540543640 has 96 divisors (see below), whose sum is σ = 33388906320. Its totient is φ = 4939144704.

The previous prime is 13540543619. The next prime is 13540543703. The reversal of 13540543640 is 4634504531.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13540543640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 549014 + ... + 573146.

Almost surely, 2^13540543640 is an apocalyptic number.

13540543640 is a gapful number since it is divisible by the number (10) 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 13540543640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16694453160).

13540543640 is an abundant number, since it is smaller than the sum of its proper divisors (19848362680).

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

13540543640 is a wasteful number, since it uses less digits than its factorization.

13540543640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24253 (or 24236 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

The spelling of 13540543640 in words is "thirteen billion, five hundred forty million, five hundred forty-three thousand, six hundred forty".