1263081081008 has 20 divisors (see below), whose sum is σ = 2576020626360. Its totient is φ = 598301564544.

The previous prime is 1263081081001. The next prime is 1263081081019. The reversal of 1263081081008 is 8001801803621.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (1263081081001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2077435685 + ... + 2077436292.

It is an arithmetic number, because the mean of its divisors is an integer number (128801031318).

Almost surely, 2^{1263081081008} is an apocalyptic number.

It is an amenable number.

1263081081008 is an abundant number, since it is smaller than the sum of its proper divisors (1312939545352).

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

1263081081008 is a wasteful number, since it uses less digits than its factorization.

1263081081008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4154872004 (or 4154871998 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 38.

Adding to 1263081081008 its reverse (8001801803621), we get a palindrome (9264882884629).

The spelling of 1263081081008 in words is "one trillion, two hundred sixty-three billion, eighty-one million, eighty-one thousand, eight".