263640612161026 has 32 divisors (see below), whose sum is σ = 411886437937920. Its totient is φ = 126445937688000.

The previous prime is 263640612161021. The next prime is 263640612161033. The reversal of 263640612161026 is 620161216046362.

It is not an unprimeable number, because it can be changed into a prime (263640612161021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127969020 + ... + 130012888.

It is an arithmetic number, because the mean of its divisors is an integer number (12871451185560).

Almost surely, 2^{263640612161026} is an apocalyptic number.

263640612161026 is a deficient number, since it is larger than the sum of its proper divisors (148245825776894).

263640612161026 is a wasteful number, since it uses less digits than its factorization.

263640612161026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068530.

The product of its (nonzero) digits is 746496, while the sum is 46.

The spelling of 263640612161026 in words is "two hundred sixty-three trillion, six hundred forty billion, six hundred twelve million, one hundred sixty-one thousand, twenty-six".