85434136867 has 4 divisors (see below), whose sum is σ = 85958272840. Its totient is φ = 84910000896.

The previous prime is 85434136859. The next prime is 85434136873. The reversal of 85434136867 is 76863143458.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76863143458 = 2 ⋅38431571729.

It is a cyclic number.

It is not a de Polignac number, because 85434136867 - 2³ = 85434136859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85434136897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262067742 + ... + 262068067.

It is an arithmetic number, because the mean of its divisors is an integer number (21489568210).

Almost surely, 2^85434136867 is an apocalyptic number.

85434136867 is a deficient number, since it is larger than the sum of its proper divisors (524135973).

85434136867 is a wasteful number, since it uses less digits than its factorization.

85434136867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524135972.

The product of its digits is 11612160, while the sum is 55.

The spelling of 85434136867 in words is "eighty-five billion, four hundred thirty-four million, one hundred thirty-six thousand, eight hundred sixty-seven".