263665053256 has 16 divisors (see below), whose sum is σ = 539314881840. Its totient is φ = 119847751440.

The previous prime is 263665053251. The next prime is 263665053259. The reversal of 263665053256 is 652350566362.

It is not an unprimeable number, because it can be changed into a prime (263665053251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1498096806 + ... + 1498096981.

It is an arithmetic number, because the mean of its divisors is an integer number (33707180115).

Almost surely, 2^263665053256 is an apocalyptic number.

It is an amenable number.

263665053256 is an abundant number, since it is smaller than the sum of its proper divisors (275649828584).

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

263665053256 is a wasteful number, since it uses less digits than its factorization.

263665053256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2996193804 (or 2996193800 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 49.

The spelling of 263665053256 in words is "two hundred sixty-three billion, six hundred sixty-five million, fifty-three thousand, two hundred fifty-six".