1263881080440 has 192 divisors, whose sum is σ = 4602142452960. Its totient is φ = 298114421760.

The previous prime is 1263881080387. The next prime is 1263881080447. The reversal of 1263881080440 is 440801883621.

1263881080440 is a `hidden beast` number, since 1 + 2 + 638 + 8 + 1 + 0 + 8 + 0 + 4 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263881080447) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4166479 + ... + 4459518.

Almost surely, 2^{1263881080440} is an apocalyptic number.

1263881080440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263881080440 is an abundant number, since it is smaller than the sum of its proper divisors (3338261372520).

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

1263881080440 is a wasteful number, since it uses less digits than its factorization.

1263881080440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8626062 (or 8626055 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The spelling of 1263881080440 in words is "one trillion, two hundred sixty-three billion, eight hundred eighty-one million, eighty thousand, four hundred forty".