74909250165638 has 48 divisors (see below), whose sum is σ = 135003825871488. Its totient is φ = 31050297936000.

The previous prime is 74909250165587. The next prime is 74909250165653. The reversal of 74909250165638 is 83656105290947.

It is a super-3 number, since 3×74909250165638³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1935293 + ... + 12392088.

It is an arithmetic number, because the mean of its divisors is an integer number (2812579705656).

It is a 2-persistent number, because it is pandigital, and so is 2⋅74909250165638 = 149818500331276, but 3⋅74909250165638 = 224727750496914 is not.

Almost surely, 2^{74909250165638} is an apocalyptic number.

74909250165638 is a deficient number, since it is larger than the sum of its proper divisors (60094575705850).

74909250165638 is a wasteful number, since it uses less digits than its factorization.

74909250165638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14329149 (or 14329142 counting only the distinct ones).

The product of its (nonzero) digits is 97977600, while the sum is 65.

The spelling of 74909250165638 in words is "seventy-four trillion, nine hundred nine billion, two hundred fifty million, one hundred sixty-five thousand, six hundred thirty-eight".