2135907816178 has 16 divisors (see below), whose sum is σ = 3208848363864. Its totient is φ = 1066292709120.

The previous prime is 2135907816173. The next prime is 2135907816181. The reversal of 2135907816178 is 8716187095312.

It can be written as a sum of positive squares in 4 ways, for example, as 2020312576129 + 115595240049 = 1421377^2 + 339993^2 .

It is a super-3 number, since 3×2135907816178³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2135907816173) 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, 3987508 + ... + 4491328.

Almost surely, 2^{2135907816178} is an apocalyptic number.

2135907816178 is a deficient number, since it is larger than the sum of its proper divisors (1072940547686).

2135907816178 is a wasteful number, since it uses less digits than its factorization.

2135907816178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507117.

The product of its (nonzero) digits is 5080320, while the sum is 58.

The spelling of 2135907816178 in words is "two trillion, one hundred thirty-five billion, nine hundred seven million, eight hundred sixteen thousand, one hundred seventy-eight".