80319279344640 has 352 divisors, whose sum is σ = 299842386315264. Its totient is φ = 17968080814080.

The previous prime is 80319279344639. The next prime is 80319279344683. The reversal of 80319279344640 is 4644397291308.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2893551 + ... + 13000430.

Almost surely, 2^{80319279344640} is an apocalyptic number.

80319279344640 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 80319279344640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149921193157632).

80319279344640 is an abundant number, since it is smaller than the sum of its proper divisors (219523106970624).

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

80319279344640 is a wasteful number, since it uses less digits than its factorization.

80319279344640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15894063 (or 15894045 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 60.

The spelling of 80319279344640 in words is "eighty trillion, three hundred nineteen billion, two hundred seventy-nine million, three hundred forty-four thousand, six hundred forty".