85184578837 has 2 divisors, whose sum is σ = 85184578838. Its totient is φ = 85184578836.

The previous prime is 85184578799. The next prime is 85184578909. The reversal of 85184578837 is 73887548158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85174087716 + 10491121 = 291846^2 + 3239^2 .

It is a cyclic number.

It is not a de Polignac number, because 85184578837 - 2⁷ = 85184578709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85184588837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42592289418 + 42592289419.

It is an arithmetic number, because the mean of its divisors is an integer number (42592289419).

Almost surely, 2^85184578837 is an apocalyptic number.

It is an amenable number.

85184578837 is a deficient number, since it is larger than the sum of its proper divisors (1).

85184578837 is an equidigital number, since it uses as much as digits as its factorization.

85184578837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60211200, while the sum is 64.

The spelling of 85184578837 in words is "eighty-five billion, one hundred eighty-four million, five hundred seventy-eight thousand, eight hundred thirty-seven".