278352911980 has 48 divisors (see below), whose sum is σ = 686733624864. Its totient is φ = 93433144320.

The previous prime is 278352911897. The next prime is 278352911981. The reversal of 278352911980 is 89119253872.

It is a happy number.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is not an unprimeable number, because it can be changed into a prime (278352911981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48660237 + ... + 48665956.

It is an arithmetic number, because the mean of its divisors is an integer number (14306950518).

Almost surely, 2^278352911980 is an apocalyptic number.

278352911980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278352911980 is an abundant number, since it is smaller than the sum of its proper divisors (408380712884).

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

278352911980 is a wasteful number, since it uses less digits than its factorization.

278352911980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97326226 (or 97326224 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 278352911980 in words is "two hundred seventy-eight billion, three hundred fifty-two million, nine hundred eleven thousand, nine hundred eighty".