85638232897 has 4 divisors (see below), whose sum is σ = 97872266176. Its totient is φ = 73404199620.

The previous prime is 85638232891. The next prime is 85638232903. The reversal of 85638232897 is 79823283658.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (85638232891) and next prime (85638232903).

It is a cyclic number.

It is not a de Polignac number, because 85638232897 - 2¹¹ = 85638230849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85638232891) 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, 6117016629 + ... + 6117016642.

It is an arithmetic number, because the mean of its divisors is an integer number (24468066544).

Almost surely, 2^85638232897 is an apocalyptic number.

It is an amenable number.

85638232897 is a deficient number, since it is larger than the sum of its proper divisors (12234033279).

85638232897 is a wasteful number, since it uses less digits than its factorization.

85638232897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12234033278.

The product of its digits is 34836480, while the sum is 61.

The spelling of 85638232897 in words is "eighty-five billion, six hundred thirty-eight million, two hundred thirty-two thousand, eight hundred ninety-seven".