63781018243 has 16 divisors (see below), whose sum is σ = 68435619840. Its totient is φ = 59261911200.

The previous prime is 63781018241. The next prime is 63781018283. The reversal of 63781018243 is 34281018736.

63781018243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 63781018243 - 2¹ = 63781018241 is a prime.

It is a super-2 number, since 2×63781018243² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63781018243.

It is not an unprimeable number, because it can be changed into a prime (63781018241) 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, 322878 + ... + 481468.

It is an arithmetic number, because the mean of its divisors is an integer number (4277226240).

Almost surely, 2^63781018243 is an apocalyptic number.

63781018243 is a deficient number, since it is larger than the sum of its proper divisors (4654601597).

63781018243 is a wasteful number, since it uses less digits than its factorization.

63781018243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159018.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 63781018243 in words is "sixty-three billion, seven hundred eighty-one million, eighteen thousand, two hundred forty-three".