263680452340 has 24 divisors (see below), whose sum is σ = 554423749992. Its totient is φ = 105339838080.

The previous prime is 263680452337. The next prime is 263680452361. The reversal of 263680452340 is 43254086362.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 56717327716 + 206963124624 = 238154^2 + 454932^2 .

It is a super-4 number, since 4×263680452340⁴ (a number of 47 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8255091 + ... + 8286970.

It is an arithmetic number, because the mean of its divisors is an integer number (23100989583).

Almost surely, 2^263680452340 is an apocalyptic number.

263680452340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263680452340 is an abundant number, since it is smaller than the sum of its proper divisors (290743297652).

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

263680452340 is a wasteful number, since it uses less digits than its factorization.

263680452340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16542867 (or 16542865 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 43.

The spelling of 263680452340 in words is "two hundred sixty-three billion, six hundred eighty million, four hundred fifty-two thousand, three hundred forty".