263116331540 has 36 divisors (see below), whose sum is σ = 564550785876. Its totient is φ = 103007227392.

The previous prime is 263116331537. The next prime is 263116331551. The reversal of 263116331540 is 45133611362.

It can be written as a sum of positive squares in 2 ways, for example, as 161332362244 + 101783969296 = 401662^2 + 319036^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 263116331540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2933597 + ... + 3021956.

Almost surely, 2^263116331540 is an apocalyptic number.

263116331540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263116331540 is an abundant number, since it is smaller than the sum of its proper divisors (301434454336).

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

263116331540 is a wasteful number, since it uses less digits than its factorization.

263116331540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5955656 (or 5955607 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 263116331540 in words is "two hundred sixty-three billion, one hundred sixteen million, three hundred thirty-one thousand, five hundred forty".