80278978560 has 400 divisors, whose sum is σ = 289910283840. Its totient is φ = 18790481920.

The previous prime is 80278978553. The next prime is 80278978609. The reversal of 80278978560 is 6587987208.

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

It is a junction number, because it is equal to n+sod(n) for n = 80278978494 and 80278978503.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2768240626 + ... + 2768240654.

Almost surely, 2^80278978560 is an apocalyptic number.

80278978560 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

80278978560 is a droll number since its even prime factors and its odd prime factors have the same sum.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80278978560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144955141920).

80278978560 is an abundant number, since it is smaller than the sum of its proper divisors (209631305280).

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

80278978560 is an frugal number, since it uses more digits than its factorization.

80278978560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 60.

The spelling of 80278978560 in words is "eighty billion, two hundred seventy-eight million, nine hundred seventy-eight thousand, five hundred sixty".