278240966250 has 240 divisors, whose sum is σ = 759133799424. Its totient is φ = 67931136000.

The previous prime is 278240966243. The next prime is 278240966257. The reversal of 278240966250 is 52669042872.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (278240966243) and next prime (278240966257).

It is a junction number, because it is equal to n+sod(n) for n = 278240966193 and 278240966202.

It is not an unprimeable number, because it can be changed into a prime (278240966257) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 80484522 + ... + 80487978.

Almost surely, 2^278240966250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 278240966250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (379566899712).

278240966250 is an abundant number, since it is smaller than the sum of its proper divisors (480892833174).

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

278240966250 is a wasteful number, since it uses less digits than its factorization.

278240966250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3635 (or 3607 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 278240966250 in words is "two hundred seventy-eight billion, two hundred forty million, nine hundred sixty-six thousand, two hundred fifty".