135123251216 has 40 divisors (see below), whose sum is σ = 277750318080. Its totient is φ = 63501750144.

The previous prime is 135123251209. The next prime is 135123251239. The reversal of 135123251216 is 612152321531.

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 7 ways as a sum of consecutive naturals, for example, 1711331 + ... + 1788546.

It is an arithmetic number, because the mean of its divisors is an integer number (6943757952).

Almost surely, 2^135123251216 is an apocalyptic number.

135123251216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

135123251216 is an abundant number, since it is smaller than the sum of its proper divisors (142627066864).

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

135123251216 is a wasteful number, since it uses less digits than its factorization.

135123251216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500031 (or 3500025 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

Adding to 135123251216 its reverse (612152321531), we get a palindrome (747275572747).

The spelling of 135123251216 in words is "one hundred thirty-five billion, one hundred twenty-three million, two hundred fifty-one thousand, two hundred sixteen".