263428375616 has 112 divisors (see below), whose sum is σ = 616976842752. Its totient is φ = 109205107200.

The previous prime is 263428375603. The next prime is 263428375627. The reversal of 263428375616 is 616573824362.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50980265 + ... + 50985431.

Almost surely, 2^263428375616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263428375616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308488421376).

263428375616 is an abundant number, since it is smaller than the sum of its proper divisors (353548467136).

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

263428375616 is a wasteful number, since it uses less digits than its factorization.

263428375616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8888 (or 8878 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 53.

The spelling of 263428375616 in words is "two hundred sixty-three billion, four hundred twenty-eight million, three hundred seventy-five thousand, six hundred sixteen".