263927012778 has 96 divisors (see below), whose sum is σ = 672504094080. Its totient is φ = 73749928320.

The previous prime is 263927012743. The next prime is 263927012803. The reversal of 263927012778 is 877210729362.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2478088 + ... + 2582396.

It is an arithmetic number, because the mean of its divisors is an integer number (7005250980).

Almost surely, 2^263927012778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263927012778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336252047040).

263927012778 is an abundant number, since it is smaller than the sum of its proper divisors (408577081302).

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

263927012778 is a wasteful number, since it uses less digits than its factorization.

263927012778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105324 (or 105321 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 54.

The spelling of 263927012778 in words is "two hundred sixty-three billion, nine hundred twenty-seven million, twelve thousand, seven hundred seventy-eight".