263113355555442 has 384 divisors, whose sum is σ = 706745598105600. Its totient is φ = 72260084437632.

The previous prime is 263113355555299. The next prime is 263113355555443. The reversal of 263113355555442 is 244555553311362.

It is a happy number.

263113355555442 is a `hidden beast` number, since 2 + 6 + 3 + 1 + 1 + 3 + 35 + 55 + 554 + 4 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (263113355555443) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 26558323053 + ... + 26558332959.

It is an arithmetic number, because the mean of its divisors is an integer number (1840483328400).

Almost surely, 2^{263113355555442} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263113355555442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353372799052800).

263113355555442 is an abundant number, since it is smaller than the sum of its proper divisors (443632242550158).

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

263113355555442 is a wasteful number, since it uses less digits than its factorization.

263113355555442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11467 (or 11454 counting only the distinct ones).

The product of its digits is 32400000, while the sum is 54.

The spelling of 263113355555442 in words is "two hundred sixty-three trillion, one hundred thirteen billion, three hundred fifty-five million, five hundred fifty-five thousand, four hundred forty-two".