1263889025240 has 16 divisors (see below), whose sum is σ = 2843750306880. Its totient is φ = 505555610080.

The previous prime is 1263889025219. The next prime is 1263889025293. The reversal of 1263889025240 is 425209883621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15798612776 + ... + 15798612855.

It is an arithmetic number, because the mean of its divisors is an integer number (177734394180).

Almost surely, 2^{1263889025240} is an apocalyptic number.

1263889025240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263889025240 is an abundant number, since it is smaller than the sum of its proper divisors (1579861281640).

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

1263889025240 is a wasteful number, since it uses less digits than its factorization.

1263889025240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31597225642 (or 31597225638 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 1263889025240 in words is "one trillion, two hundred sixty-three billion, eight hundred eighty-nine million, twenty-five thousand, two hundred forty".