263474205615664 has 40 divisors (see below), whose sum is σ = 537416965793840. Its totient is φ = 124787717849088.

The previous prime is 263474205615661. The next prime is 263474205615679. The reversal of 263474205615664 is 466516502474362.

It is not an unprimeable number, because it can be changed into a prime (263474205615661) 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, 52648617 + ... + 57435400.

It is an arithmetic number, because the mean of its divisors is an integer number (13435424144846).

Almost surely, 2^{263474205615664} is an apocalyptic number.

It is an amenable number.

263474205615664 is an abundant number, since it is smaller than the sum of its proper divisors (273942760178176).

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

263474205615664 is a wasteful number, since it uses less digits than its factorization.

263474205615664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110091917 (or 110091911 counting only the distinct ones).

The product of its (nonzero) digits is 174182400, while the sum is 61.

The spelling of 263474205615664 in words is "two hundred sixty-three trillion, four hundred seventy-four billion, two hundred five million, six hundred fifteen thousand, six hundred sixty-four".