278178481152 has 792 divisors, whose sum is σ = 983065690880. Its totient is φ = 75180441600.

The previous prime is 278178481033. The next prime is 278178481153. The reversal of 278178481152 is 251184871872.

278178481152 is a `hidden beast` number, since 2 + 7 + 8 + 1 + 7 + 8 + 481 + 152 = 666.

It is a tau number, because it is divible by the number of its divisors (792).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (278178481153) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 449399499 + ... + 449400117.

Almost surely, 2^278178481152 is an apocalyptic number.

278178481152 is a gapful number since it is divisible by the number (22) 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 278178481152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (491532845440).

278178481152 is an abundant number, since it is smaller than the sum of its proper divisors (704887209728).

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

278178481152 is a wasteful number, since it uses less digits than its factorization.

278178481152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711 (or 679 counting only the distinct ones).

The product of its digits is 2007040, while the sum is 54.

The spelling of 278178481152 in words is "two hundred seventy-eight billion, one hundred seventy-eight million, four hundred eighty-one thousand, one hundred fifty-two".