1287008709657 has 48 divisors (see below), whose sum is σ = 1918944471360. Its totient is φ = 766486512000.

The previous prime is 1287008709647. The next prime is 1287008709667. The reversal of 1287008709657 is 7569078007821.

It is an interprime number because it is at equal distance from previous prime (1287008709647) and next prime (1287008709667).

It is not a de Polignac number, because 1287008709657 - 2⁶ = 1287008709593 is a prime.

It is a super-2 number, since 2×1287008709657² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1287008709657.

It is not an unprimeable number, because it can be changed into a prime (1287008709647) 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, 23643682 + ... + 23698052.

It is an arithmetic number, because the mean of its divisors is an integer number (39978009820).

Almost surely, 2^{1287008709657} is an apocalyptic number.

It is an amenable number.

1287008709657 is a deficient number, since it is larger than the sum of its proper divisors (631935761703).

1287008709657 is a wasteful number, since it uses less digits than its factorization.

1287008709657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55526 (or 55515 counting only the distinct ones).

The product of its (nonzero) digits is 11854080, while the sum is 60.

The spelling of 1287008709657 in words is "one trillion, two hundred eighty-seven billion, eight million, seven hundred nine thousand, six hundred fifty-seven".