131819999999 has 16 divisors (see below), whose sum is σ = 140850731520. Its totient is φ = 122936027520.

The previous prime is 131819999957. The next prime is 131820000007. The reversal of 131819999999 is 999999918131.

It is a cyclic number.

It is not a de Polignac number, because 131819999999 - 2⁸ = 131819999743 is a prime.

It is a Duffinian number.

131819999999 is a modest number, since divided by 999999 gives 131819 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131819999099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 784634 + ... + 937704.

It is an arithmetic number, because the mean of its divisors is an integer number (8803170720).

Almost surely, 2^131819999999 is an apocalyptic number.

131819999999 is a deficient number, since it is larger than the sum of its proper divisors (9030731521).

131819999999 is a wasteful number, since it uses less digits than its factorization.

131819999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153550.

The product of its digits is 114791256, while the sum is 77.

The spelling of 131819999999 in words is "one hundred thirty-one billion, eight hundred nineteen million, nine hundred ninety-nine thousand, nine hundred ninety-nine".