263655985740 has 96 divisors (see below), whose sum is σ = 849361766400. Its totient is φ = 59859753216.

The previous prime is 263655985717. The next prime is 263655985741. The reversal of 263655985740 is 47589556362.

263655985740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (263655985741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2043972 + ... + 2169131.

It is an arithmetic number, because the mean of its divisors is an integer number (8847518400).

Almost surely, 2^263655985740 is an apocalyptic number.

263655985740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263655985740 is an abundant number, since it is smaller than the sum of its proper divisors (585705780660).

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

263655985740 is a wasteful number, since it uses less digits than its factorization.

263655985740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4213271 (or 4213269 counting only the distinct ones).

The product of its (nonzero) digits is 54432000, while the sum is 60.

The spelling of 263655985740 in words is "two hundred sixty-three billion, six hundred fifty-five million, nine hundred eighty-five thousand, seven hundred forty".