1778028293952 has 196 divisors, whose sum is σ = 5292243777696. Its totient is φ = 592423891200.

The previous prime is 1778028293939. The next prime is 1778028293981. The reversal of 1778028293952 is 2593928208771.

It is a super-2 number, since 2×1778028293952² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1778028293952.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 133009573 + ... + 133022939.

Almost surely, 2^{1778028293952} is an apocalyptic number.

1778028293952 is a gapful number since it is divisible by the number (12) 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 1778028293952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2646121888848).

1778028293952 is an abundant number, since it is smaller than the sum of its proper divisors (3514215483744).

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

1778028293952 is an equidigital number, since it uses as much as digits as its factorization.

1778028293952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16248 (or 16223 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 63.

The spelling of 1778028293952 in words is "one trillion, seven hundred seventy-eight billion, twenty-eight million, two hundred ninety-three thousand, nine hundred fifty-two".