88400000009 has 4 divisors (see below), whose sum is σ = 88419060480. Its totient is φ = 88380939540.

The previous prime is 88399999991. The next prime is 88400000011. The reversal of 88400000009 is 90000000488.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88400000009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (88400000309) 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, 9523277 + ... + 9532554.

It is an arithmetic number, because the mean of its divisors is an integer number (22104765120).

Almost surely, 2^88400000009 is an apocalyptic number.

It is an amenable number.

88400000009 is a deficient number, since it is larger than the sum of its proper divisors (19060471).

88400000009 is a wasteful number, since it uses less digits than its factorization.

88400000009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19060470.

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 88400000009 in words is "eighty-eight billion, four hundred million, nine", and thus it is an aban number.