135721507216 has 45 divisors (see below), whose sum is σ = 271808133579. Its totient is φ = 65649592800.

The previous prime is 135721507189. The next prime is 135721507253. The reversal of 135721507216 is 612705127531.

The square root of 135721507216 is 368404.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 45680611 + ... + 45683581.

Almost surely, 2^135721507216 is an apocalyptic number.

135721507216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

135721507216 is the 368404-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135721507216

135721507216 is an abundant number, since it is smaller than the sum of its proper divisors (136086626363).

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

135721507216 is an frugal number, since it uses more digits than its factorization.

135721507216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6012 (or 3004 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 135721507216 in words is "one hundred thirty-five billion, seven hundred twenty-one million, five hundred seven thousand, two hundred sixteen".