85878855533 has 2 divisors, whose sum is σ = 85878855534. Its totient is φ = 85878855532.

The previous prime is 85878855523. The next prime is 85878855539. The reversal of 85878855533 is 33555887858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67185676804 + 18693178729 = 259202^2 + 136723^2 .

It is a cyclic number.

It is not a de Polignac number, because 85878855533 - 2⁸ = 85878855277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 85878855533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85878855539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42939427766 + 42939427767.

It is an arithmetic number, because the mean of its divisors is an integer number (42939427767).

Almost surely, 2^85878855533 is an apocalyptic number.

It is an amenable number.

85878855533 is a deficient number, since it is larger than the sum of its proper divisors (1).

85878855533 is an equidigital number, since it uses as much as digits as its factorization.

85878855533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280000, while the sum is 65.

The spelling of 85878855533 in words is "eighty-five billion, eight hundred seventy-eight million, eight hundred fifty-five thousand, five hundred thirty-three".