1234560987665 has 8 divisors (see below), whose sum is σ = 1483277664168. Its totient is φ = 986445804160.

The previous prime is 1234560987589. The next prime is 1234560987713. The reversal of 1234560987665 is 5667890654321.

It is a Cunningham number, because it is equal to 1111108²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 337087070464 + 897473917201 = 580592^2 + 947351^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1234560987665 - 2²⁰ = 1234559939089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1234560987598 and 1234560987607.

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, 150368732 + ... + 150376941.

It is an arithmetic number, because the mean of its divisors is an integer number (185409708021).

It is a 1-persistent number, because it is pandigital, but 2⋅1234560987665 = 2469121975330 is not.

Almost surely, 2^{1234560987665} is an apocalyptic number.

It is an amenable number.

1234560987665 is a deficient number, since it is larger than the sum of its proper divisors (248716676503).

1234560987665 is an equidigital number, since it uses as much as digits as its factorization.

1234560987665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300746499.

The product of its (nonzero) digits is 65318400, while the sum is 62.

The spelling of 1234560987665 in words is "one trillion, two hundred thirty-four billion, five hundred sixty million, nine hundred eighty-seven thousand, six hundred sixty-five".