85413477109 has 2 divisors, whose sum is σ = 85413477110. Its totient is φ = 85413477108.

The previous prime is 85413477089. The next prime is 85413477113. The reversal of 85413477109 is 90177431458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75819274609 + 9594202500 = 275353^2 + 97950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85413477109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85413477169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42706738554 + 42706738555.

It is an arithmetic number, because the mean of its divisors is an integer number (42706738555).

Almost surely, 2^85413477109 is an apocalyptic number.

It is an amenable number.

85413477109 is a deficient number, since it is larger than the sum of its proper divisors (1).

85413477109 is an equidigital number, since it uses as much as digits as its factorization.

85413477109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 85413477109 in words is "eighty-five billion, four hundred thirteen million, four hundred seventy-seven thousand, one hundred nine".