80679403520 has 144 divisors (see below), whose sum is σ = 194744986128. Its totient is φ = 32086425600.

The previous prime is 80679403499. The next prime is 80679403561. The reversal of 80679403520 is 2530497608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201195320 + ... + 201195720.

It is an arithmetic number, because the mean of its divisors is an integer number (1352395737).

Almost surely, 2^80679403520 is an apocalyptic number.

80679403520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80679403520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97372493064).

80679403520 is an abundant number, since it is smaller than the sum of its proper divisors (114065582608).

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

80679403520 is an frugal number, since it uses more digits than its factorization.

80679403520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 80679403520 in words is "eighty billion, six hundred seventy-nine million, four hundred three thousand, five hundred twenty".