278324379648 has 204 divisors, whose sum is σ = 918918858208. Its totient is φ = 79520071680.

The previous prime is 278324379611. The next prime is 278324379677. The reversal of 278324379648 is 846973423872.

278324379648 is a `hidden beast` number, since 2 + 78 + 3 + 2 + 437 + 96 + 48 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

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 11 ways as a sum of consecutive naturals, for example, 4095063 + ... + 4162473.

Almost surely, 2^278324379648 is an apocalyptic number.

278324379648 is a gapful number since it is divisible by the number (28) 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 278324379648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459459429104).

278324379648 is an abundant number, since it is smaller than the sum of its proper divisors (640594478560).

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

278324379648 is an frugal number, since it uses more digits than its factorization.

278324379648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67456 (or 67423 counting only the distinct ones).

The product of its digits is 97542144, while the sum is 63.

The spelling of 278324379648 in words is "two hundred seventy-eight billion, three hundred twenty-four million, three hundred seventy-nine thousand, six hundred forty-eight".