1387535491049 has 4 divisors (see below), whose sum is σ = 1387538401236. Its totient is φ = 1387532580864.

The previous prime is 1387535491033. The next prime is 1387535491051. The reversal of 1387535491049 is 9401945357831.

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 941204604649 + 446330886400 = 970157^2 + 668080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387535491049 - 2⁴ = 1387535491033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1387535481049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553844 + ... + 1755509.

It is an arithmetic number, because the mean of its divisors is an integer number (346884600309).

Almost surely, 2^{1387535491049} is an apocalyptic number.

It is an amenable number.

1387535491049 is a deficient number, since it is larger than the sum of its proper divisors (2910187).

1387535491049 is an equidigital number, since it uses as much as digits as its factorization.

1387535491049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2910186.

The product of its (nonzero) digits is 16329600, while the sum is 59.

The spelling of 1387535491049 in words is "one trillion, three hundred eighty-seven billion, five hundred thirty-five million, four hundred ninety-one thousand, forty-nine".