1285643374488 has 48 divisors (see below), whose sum is σ = 3798491790600. Its totient is φ = 389588901120.

The previous prime is 1285643374481. The next prime is 1285643374523. The reversal of 1285643374488 is 8844733465821.

1285643374488 is a `hidden beast` number, since 1 + 2 + 8 + 56 + 4 + 33 + 74 + 488 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285643374481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 811642753 + ... + 811644336.

Almost surely, 2^{1285643374488} is an apocalyptic number.

1285643374488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1285643374488 is an abundant number, since it is smaller than the sum of its proper divisors (2512848416112).

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

1285643374488 is a wasteful number, since it uses less digits than its factorization.

1285643374488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623287112 (or 1623287105 counting only the distinct ones).

The product of its digits is 123863040, while the sum is 63.

The spelling of 1285643374488 in words is "one trillion, two hundred eighty-five billion, six hundred forty-three million, three hundred seventy-four thousand, four hundred eighty-eight".