78442758129 has 8 divisors (see below), whose sum is σ = 104833014912. Its totient is φ = 52173836720.

The previous prime is 78442758089. The next prime is 78442758139. The reversal of 78442758129 is 92185724487.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78442758129 - 2⁷ = 78442758001 is a prime.

It is a super-3 number, since 3×78442758129³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (78442758139) 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, 30332334 + ... + 30334919.

It is an arithmetic number, because the mean of its divisors is an integer number (13104126864).

Almost surely, 2^78442758129 is an apocalyptic number.

It is an amenable number.

78442758129 is a deficient number, since it is larger than the sum of its proper divisors (26390256783).

78442758129 is a wasteful number, since it uses less digits than its factorization.

78442758129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60667687.

The product of its digits is 9031680, while the sum is 57.

It can be divided in two parts, 78442 and 758129, that added together give a triangular number (836571 = T₁₂₉₃).

The spelling of 78442758129 in words is "seventy-eight billion, four hundred forty-two million, seven hundred fifty-eight thousand, one hundred twenty-nine".