278023670848560 has 640 divisors, whose sum is σ = 1086505179217920. Its totient is φ = 57239330254848.

The previous prime is 278023670848543. The next prime is 278023670848571. The reversal of 278023670848560 is 65848076320872.

It is a junction number, because it is equal to n+sod(n) for n = 278023670848491 and 278023670848500.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 956818017 + ... + 957108543.

It is an arithmetic number, because the mean of its divisors is an integer number (1697664342528).

Almost surely, 2^{278023670848560} is an apocalyptic number.

278023670848560 is a gapful number since it is divisible by the number (20) 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 278023670848560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (543252589608960).

278023670848560 is an abundant number, since it is smaller than the sum of its proper divisors (808481508369360).

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

278023670848560 is a wasteful number, since it uses less digits than its factorization.

278023670848560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291625 (or 291619 counting only the distinct ones).

The product of its (nonzero) digits is 216760320, while the sum is 66.

The spelling of 278023670848560 in words is "two hundred seventy-eight trillion, twenty-three billion, six hundred seventy million, eight hundred forty-eight thousand, five hundred sixty".