1226309329878 has 16 divisors (see below), whose sum is σ = 2596890345840. Its totient is φ = 384724495616.

The previous prime is 1226309329829. The next prime is 1226309329901. The reversal of 1226309329878 is 8789239036221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6011320143 + ... + 6011320346.

It is an arithmetic number, because the mean of its divisors is an integer number (162305646615).

Almost surely, 2^{1226309329878} is an apocalyptic number.

1226309329878 is an abundant number, since it is smaller than the sum of its proper divisors (1370581015962).

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

1226309329878 is a wasteful number, since it uses less digits than its factorization.

1226309329878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12022640511.

The product of its (nonzero) digits is 15676416, while the sum is 60.

The spelling of 1226309329878 in words is "one trillion, two hundred twenty-six billion, three hundred nine million, three hundred twenty-nine thousand, eight hundred seventy-eight".