65238139002169 has 15 divisors (see below), whose sum is σ = 76107095341007. Its totient is φ = 55918065624456.

The previous prime is 65238139002143. The next prime is 65238139002173. The reversal of 65238139002169 is 96120093183256.

The square root of 65238139002169 is 8077013.

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

It can be written as a sum of positive squares in only one way, i.e., 65236555917225 + 1583084944 = 8076915^2 + 39788^2 .

It is not a de Polignac number, because 65238139002169 - 2¹⁷ = 65238138871097 is a prime.

It is a super-2 number, since 2×65238139002169² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65238139006169) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 395691219 + ... + 395856055.

Almost surely, 2^{65238139002169} is an apocalyptic number.

65238139002169 is the 8077013-rd square number.

65238139002169 is the 4038507-th centered octagonal number.

It is an amenable number.

65238139002169 is a deficient number, since it is larger than the sum of its proper divisors (10868956338838).

65238139002169 is an frugal number, since it uses more digits than its factorization.

65238139002169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329702 (or 164844 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 65238139002169 in words is "sixty-five trillion, two hundred thirty-eight billion, one hundred thirty-nine million, two thousand, one hundred sixty-nine".