263401651632 has 160 divisors (see below), whose sum is σ = 803075457024. Its totient is φ = 72800236800.

The previous prime is 263401651627. The next prime is 263401651687. The reversal of 263401651632 is 236156104362.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 41733757 + ... + 41740067.

Almost surely, 2^263401651632 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 263401651632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401537728512).

263401651632 is an abundant number, since it is smaller than the sum of its proper divisors (539673805392).

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

263401651632 is a wasteful number, since it uses less digits than its factorization.

263401651632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10367 (or 10361 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

Adding to 263401651632 its reverse (236156104362), we get a palindrome (499557755994).

The spelling of 263401651632 in words is "two hundred sixty-three billion, four hundred one million, six hundred fifty-one thousand, six hundred thirty-two".