263778796836 has 63 divisors (see below), whose sum is σ = 692175511083. Its totient is φ = 87917020920.

The previous prime is 263778796829. The next prime is 263778796847. The reversal of 263778796836 is 638697877362.

The square root of 263778796836 is 513594.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×263778796836² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 27729321 + ... + 27738831.

Almost surely, 2^263778796836 is an apocalyptic number.

263778796836 is the 513594-th square number.

It is an amenable number.

263778796836 is an abundant number, since it is smaller than the sum of its proper divisors (428396714247).

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

263778796836 is an frugal number, since it uses more digits than its factorization.

263778796836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19044 (or 9516 counting only the distinct ones).

The product of its digits is 768144384, while the sum is 72.

The spelling of 263778796836 in words is "two hundred sixty-three billion, seven hundred seventy-eight million, seven hundred ninety-six thousand, eight hundred thirty-six".