13129721514 has 64 divisors (see below), whose sum is σ = 35910362880. Its totient is φ = 3462782400.

The previous prime is 13129721497. The next prime is 13129721567. The reversal of 13129721514 is 41512792131.

It is a happy number.

13129721514 is a `hidden beast` number, since 1 + 31 + 2 + 97 + 21 + 514 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1331037 + ... + 1340864.

It is an arithmetic number, because the mean of its divisors is an integer number (561099420).

Almost surely, 2^13129721514 is an apocalyptic number.

13129721514 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

13129721514 is an abundant number, since it is smaller than the sum of its proper divisors (22780641366).

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

13129721514 is a wasteful number, since it uses less digits than its factorization.

13129721514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2671932 (or 2671926 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The spelling of 13129721514 in words is "thirteen billion, one hundred twenty-nine million, seven hundred twenty-one thousand, five hundred fourteen".