80440497640 has 32 divisors (see below), whose sum is σ = 181020420000. Its totient is φ = 32170990144.

The previous prime is 80440497601. The next prime is 80440497649. The reversal of 80440497640 is 4679404408.

It is not an unprimeable number, because it can be changed into a prime (80440497649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92331 + ... + 411589.

It is an arithmetic number, because the mean of its divisors is an integer number (5656888125).

Almost surely, 2^80440497640 is an apocalyptic number.

It is an amenable number.

80440497640 is an abundant number, since it is smaller than the sum of its proper divisors (100579922360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80440497640 is a wasteful number, since it uses less digits than its factorization.

80440497640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325569 (or 325565 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 46.

The spelling of 80440497640 in words is "eighty billion, four hundred forty million, four hundred ninety-seven thousand, six hundred forty".