3822878531557 has 2 divisors, whose sum is σ = 3822878531558. Its totient is φ = 3822878531556.

The previous prime is 3822878531539. The next prime is 3822878531609. The reversal of 3822878531557 is 7551358782283.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3460972816161 + 361905715396 = 1860369^2 + 601586^2 .

It is a cyclic number.

It is not a de Polignac number, because 3822878531557 - 2⁷ = 3822878531429 is a prime.

It is a super-2 number, since 2×3822878531557² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3822878535557) by changing a digit.

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 as a sum of consecutive naturals, namely, 1911439265778 + 1911439265779.

It is an arithmetic number, because the mean of its divisors is an integer number (1911439265779).

Almost surely, 2^{3822878531557} is an apocalyptic number.

It is an amenable number.

3822878531557 is a deficient number, since it is larger than the sum of its proper divisors (1).

3822878531557 is an equidigital number, since it uses as much as digits as its factorization.

3822878531557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896000, while the sum is 64.

The spelling of 3822878531557 in words is "three trillion, eight hundred twenty-two billion, eight hundred seventy-eight million, five hundred thirty-one thousand, five hundred fifty-seven".