263494713664 has 168 divisors, whose sum is σ = 666135096480. Its totient is φ = 102471957504.

The previous prime is 263494713617. The next prime is 263494713739. The reversal of 263494713664 is 466317494362.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2350539 + ... + 2460085.

It is an arithmetic number, because the mean of its divisors is an integer number (3965089860).

Almost surely, 2^263494713664 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 263494713664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333067548240).

263494713664 is an abundant number, since it is smaller than the sum of its proper divisors (402640382816).

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

263494713664 is a wasteful number, since it uses less digits than its factorization.

263494713664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109645 (or 109628 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 55.

The spelling of 263494713664 in words is "two hundred sixty-three billion, four hundred ninety-four million, seven hundred thirteen thousand, six hundred sixty-four".