1231348578336 has 36 divisors (see below), whose sum is σ = 3501647520462. Its totient is φ = 410449526016.

The previous prime is 1231348578283. The next prime is 1231348578337. The reversal of 1231348578336 is 6338758431321.

1231348578336 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 34 + 8 + 578 + 3 + 36 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1196057198736 + 35291379600 = 1093644^2 + 187860^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1231348578337) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2137757661 + ... + 2137758236.

Almost surely, 2^{1231348578336} is an apocalyptic number.

1231348578336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1231348578336 is an abundant number, since it is smaller than the sum of its proper divisors (2270298942126).

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

1231348578336 is a wasteful number, since it uses less digits than its factorization.

1231348578336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4275515913 (or 4275515902 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 1231348578336 in words is "one trillion, two hundred thirty-one billion, three hundred forty-eight million, five hundred seventy-eight thousand, three hundred thirty-six".