85634043658 has 16 divisors (see below), whose sum is σ = 128830339080. Its totient is φ = 42690779136.

The previous prime is 85634043637. The next prime is 85634043659.

85634043658 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 85195685689 + 438357969 = 291883^2 + 20937^2 .

It is not an unprimeable number, because it can be changed into a prime (85634043659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 911910 + ... + 1001422.

Almost surely, 2^85634043658 is an apocalyptic number.

85634043658 is a deficient number, since it is larger than the sum of its proper divisors (43196295422).

85634043658 is a wasteful number, since it uses less digits than its factorization.

85634043658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90921.

The product of its (nonzero) digits is 8294400, while the sum is 52.

It can be divided in two parts, 856340 and 43658, that added together give a palindrome (899998).

The spelling of 85634043658 in words is "eighty-five billion, six hundred thirty-four million, forty-three thousand, six hundred fifty-eight".