263003233465040 has 80 divisors (see below), whose sum is σ = 647489309563152. Its totient is φ = 99007288246272.

The previous prime is 263003233465033. The next prime is 263003233465043. The reversal of 263003233465040 is 40564332300362.

It can be written as a sum of positive squares in 8 ways, for example, as 6582837015616 + 256420396449424 = 2565704^2 + 16013132^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263003233465043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18135512 + ... + 29238728.

Almost surely, 2^{263003233465040} is an apocalyptic number.

263003233465040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263003233465040 is an abundant number, since it is smaller than the sum of its proper divisors (384486076098112).

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

263003233465040 is a wasteful number, since it uses less digits than its factorization.

263003233465040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11120664 (or 11120658 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 41.

The spelling of 263003233465040 in words is "two hundred sixty-three trillion, three billion, two hundred thirty-three million, four hundred sixty-five thousand, forty".