3128878831049 has 2 divisors, whose sum is σ = 3128878831050. Its totient is φ = 3128878831048.

The previous prime is 3128878831033. The next prime is 3128878831109. The reversal of 3128878831049 is 9401388788213.

3128878831049 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1953621198400 + 1175257632649 = 1397720^2 + 1084093^2 .

It is a cyclic number.

It is not a de Polignac number, because 3128878831049 - 2⁴ = 3128878831033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3128878830982 and 3128878831000.

It is not a weakly prime, because it can be changed into another prime (3128878831249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1564439415524 + 1564439415525.

It is an arithmetic number, because the mean of its divisors is an integer number (1564439415525).

Almost surely, 2^{3128878831049} is an apocalyptic number.

It is an amenable number.

3128878831049 is a deficient number, since it is larger than the sum of its proper divisors (1).

3128878831049 is an equidigital number, since it uses as much as digits as its factorization.

3128878831049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18579456, while the sum is 62.

The spelling of 3128878831049 in words is "three trillion, one hundred twenty-eight billion, eight hundred seventy-eight million, eight hundred thirty-one thousand, forty-nine".