13240571456 has 84 divisors (see below), whose sum is σ = 30593780316. Its totient is φ = 5668992000.

The previous prime is 13240571429. The next prime is 13240571527. The reversal of 13240571456 is 65417504231.

It can be written as a sum of positive squares in 2 ways, for example, as 4599009856 + 8641561600 = 67816^2 + 92960^2 .

It is a super-3 number, since 3×13240571456³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5960426 + ... + 5962646.

Almost surely, 2^13240571456 is an apocalyptic number.

13240571456 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 13240571456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15296890158).

13240571456 is an abundant number, since it is smaller than the sum of its proper divisors (17353208860).

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

13240571456 is a wasteful number, since it uses less digits than its factorization.

13240571456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4148 (or 4131 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 13240571456 in words is "thirteen billion, two hundred forty million, five hundred seventy-one thousand, four hundred fifty-six".