13440551340 has 96 divisors (see below), whose sum is σ = 38217360384. Its totient is φ = 3528689920.

The previous prime is 13440551233. The next prime is 13440551347. The reversal of 13440551340 is 4315504431.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 13440551298 and 13440551307.

It is not an unprimeable number, because it can be changed into a prime (13440551347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3776842 + ... + 3780398.

It is an arithmetic number, because the mean of its divisors is an integer number (398097504).

Almost surely, 2^13440551340 is an apocalyptic number.

13440551340 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 13440551340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19108680192).

13440551340 is an abundant number, since it is smaller than the sum of its proper divisors (24776809044).

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

13440551340 is a wasteful number, since it uses less digits than its factorization.

13440551340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4527 (or 4525 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

It can be divided in two parts, 134405 and 51340, that added together give a triangular number (185745 = T₆₀₉).

The spelling of 13440551340 in words is "thirteen billion, four hundred forty million, five hundred fifty-one thousand, three hundred forty".