13140245540 has 24 divisors (see below), whose sum is σ = 29217723192. Its totient is φ = 4946915840.

The previous prime is 13140245509. The next prime is 13140245581. The reversal of 13140245540 is 4554204131.

It can be written as a sum of positive squares in 4 ways, for example, as 6923238436 + 6217007104 = 83206^2 + 78848^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19323551 + ... + 19324230.

It is an arithmetic number, because the mean of its divisors is an integer number (1217405133).

Almost surely, 2^13140245540 is an apocalyptic number.

13140245540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13140245540 is an abundant number, since it is smaller than the sum of its proper divisors (16077477652).

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

13140245540 is a wasteful number, since it uses less digits than its factorization.

13140245540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38647807 (or 38647805 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 13140245540 its reverse (4554204131), we get a palindrome (17694449671).

The spelling of 13140245540 in words is "thirteen billion, one hundred forty million, two hundred forty-five thousand, five hundred forty".