1306757987485 has 4 divisors (see below), whose sum is σ = 1568109584988. Its totient is φ = 1045406389984.

The previous prime is 1306757987473. The next prime is 1306757987501. The reversal of 1306757987485 is 5847897576031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 813681573849 + 493076413636 = 902043^2 + 702194^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306757987485 - 2¹⁹ = 1306757463197 is a prime.

It is a Duffinian number.

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, 130675798744 + ... + 130675798753.

It is an arithmetic number, because the mean of its divisors is an integer number (392027396247).

Almost surely, 2^{1306757987485} is an apocalyptic number.

It is an amenable number.

1306757987485 is a deficient number, since it is larger than the sum of its proper divisors (261351597503).

1306757987485 is an equidigital number, since it uses as much as digits as its factorization.

1306757987485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261351597502.

The product of its (nonzero) digits is 355622400, while the sum is 70.

The spelling of 1306757987485 in words is "one trillion, three hundred six billion, seven hundred fifty-seven million, nine hundred eighty-seven thousand, four hundred eighty-five".