13142221640 has 32 divisors (see below), whose sum is σ = 29692717560. Its totient is φ = 5235072000.

The previous prime is 13142221541. The next prime is 13142221661. The reversal of 13142221640 is 4612224131.

It can be written as a sum of positive squares in 4 ways, for example, as 12740539876 + 401681764 = 112874^2 + 20042^2 .

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, 672011 + ... + 691290.

Almost surely, 2^13142221640 is an apocalyptic number.

13142221640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13142221640 is an abundant number, since it is smaller than the sum of its proper divisors (16550495920).

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

13142221640 is a wasteful number, since it uses less digits than its factorization.

13142221640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363553 (or 1363549 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 13142221640 its reverse (4612224131), we get a palindrome (17754445771).

The spelling of 13142221640 in words is "thirteen billion, one hundred forty-two million, two hundred twenty-one thousand, six hundred forty".