263889168041 has 8 divisors (see below), whose sum is σ = 265492876968. Its totient is φ = 262289664000.

The previous prime is 263889168031. The next prime is 263889168073. The reversal of 263889168041 is 140861988362.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12883158016 + 251006010025 = 113504^2 + 501005^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 263889168041 - 2¹⁸ = 263888905897 is a prime.

It is a super-2 number, since 2×263889168041² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (263889168031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925280 + ... + 1176401.

It is an arithmetic number, because the mean of its divisors is an integer number (33186609621).

Almost surely, 2^263889168041 is an apocalyptic number.

It is an amenable number.

263889168041 is a deficient number, since it is larger than the sum of its proper divisors (1603708927).

263889168041 is a wasteful number, since it uses less digits than its factorization.

263889168041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102443.

The product of its (nonzero) digits is 3981312, while the sum is 56.

The spelling of 263889168041 in words is "two hundred sixty-three billion, eight hundred eighty-nine million, one hundred sixty-eight thousand, forty-one".