80438342865 has 32 divisors (see below), whose sum is σ = 134414401536. Its totient is φ = 40999358400.

The previous prime is 80438342861. The next prime is 80438342903. The reversal of 80438342865 is 56824383408.

It is not a de Polignac number, because 80438342865 - 2² = 80438342861 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80438342861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 295812 + ... + 498378.

It is an arithmetic number, because the mean of its divisors is an integer number (4200450048).

Almost surely, 2^80438342865 is an apocalyptic number.

It is an amenable number.

80438342865 is a deficient number, since it is larger than the sum of its proper divisors (53976058671).

80438342865 is a wasteful number, since it uses less digits than its factorization.

80438342865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203749.

The product of its (nonzero) digits is 4423680, while the sum is 51.

The spelling of 80438342865 in words is "eighty billion, four hundred thirty-eight million, three hundred forty-two thousand, eight hundred sixty-five".