74785091129 has 16 divisors (see below), whose sum is σ = 85755196800. Its totient is φ = 63886765824.

The previous prime is 74785091111. The next prime is 74785091131. The reversal of 74785091129 is 92119058747.

It is a de Polignac number, because none of the positive numbers 2^k-74785091129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74785091429) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8910467 + ... + 8918855.

It is an arithmetic number, because the mean of its divisors is an integer number (5359699800).

Almost surely, 2^74785091129 is an apocalyptic number.

It is an amenable number.

74785091129 is a deficient number, since it is larger than the sum of its proper divisors (10970105671).

74785091129 is a wasteful number, since it uses less digits than its factorization.

74785091129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12512.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The spelling of 74785091129 in words is "seventy-four billion, seven hundred eighty-five million, ninety-one thousand, one hundred twenty-nine".