1278285652350 has 240 divisors, whose sum is σ = 4069764661248. Its totient is φ = 291414231360.

The previous prime is 1278285652349. The next prime is 1278285652361. The reversal of 1278285652350 is 532565828721.

It is a happy number.

1278285652350 is a `hidden beast` number, since 1 + 2 + 7 + 8 + 2 + 8 + 565 + 23 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 10799187 + ... + 10916913.

Almost surely, 2^{1278285652350} is an apocalyptic number.

1278285652350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278285652350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2034882330624).

1278285652350 is an abundant number, since it is smaller than the sum of its proper divisors (2791479008898).

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

1278285652350 is a wasteful number, since it uses less digits than its factorization.

1278285652350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118141 (or 118127 counting only the distinct ones).

The product of its (nonzero) digits is 8064000, while the sum is 54.

The spelling of 1278285652350 in words is "one trillion, two hundred seventy-eight billion, two hundred eighty-five million, six hundred fifty-two thousand, three hundred fifty".