1285630552720 has 40 divisors (see below), whose sum is σ = 3045488989176. Its totient is φ = 504549347328.

The previous prime is 1285630552699. The next prime is 1285630552733. The reversal of 1285630552720 is 272550365821.

It can be written as a sum of positive squares in 4 ways, for example, as 591034988944 + 694595563776 = 768788^2 + 833424^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 151603137 + ... + 151611616.

Almost surely, 2^{1285630552720} is an apocalyptic number.

1285630552720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285630552720 is an abundant number, since it is smaller than the sum of its proper divisors (1759858436456).

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

1285630552720 is a wasteful number, since it uses less digits than its factorization.

1285630552720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303214819 (or 303214813 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 46.

The spelling of 1285630552720 in words is "one trillion, two hundred eighty-five billion, six hundred thirty million, five hundred fifty-two thousand, seven hundred twenty".