136878166889778 has 16 divisors (see below), whose sum is σ = 274690655741376. Its totient is φ = 45470335302960.

The previous prime is 136878166889693. The next prime is 136878166889813. The reversal of 136878166889778 is 877988661878631.

It is a super-2 number, since 2×136878166889778² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 136878166889691 and 136878166889700.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38930079838 + ... + 38930083353.

It is an arithmetic number, because the mean of its divisors is an integer number (17168165983836).

Almost surely, 2^{136878166889778} is an apocalyptic number.

136878166889778 is an abundant number, since it is smaller than the sum of its proper divisors (137812488851598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136878166889778 is a wasteful number, since it uses less digits than its factorization.

136878166889778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77860163489.

The product of its digits is 65548320768, while the sum is 93.

The spelling of 136878166889778 in words is "one hundred thirty-six trillion, eight hundred seventy-eight billion, one hundred sixty-six million, eight hundred eighty-nine thousand, seven hundred seventy-eight".