13351981456 has 40 divisors (see below), whose sum is σ = 28249308000. Its totient is φ = 6063045120.

The previous prime is 13351981439. The next prime is 13351981457. The reversal of 13351981456 is 65418915331.

It is not an unprimeable number, because it can be changed into a prime (13351981457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142120 + ... + 216568.

It is an arithmetic number, because the mean of its divisors is an integer number (706232700).

Almost surely, 2^13351981456 is an apocalyptic number.

13351981456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13351981456 is an abundant number, since it is smaller than the sum of its proper divisors (14897326544).

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

13351981456 is a wasteful number, since it uses less digits than its factorization.

13351981456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75487 (or 75481 counting only the distinct ones).

The product of its digits is 388800, while the sum is 46.

The spelling of 13351981456 in words is "thirteen billion, three hundred fifty-one million, nine hundred eighty-one thousand, four hundred fifty-six".