1387227048769 has 4 divisors (see below), whose sum is σ = 1409968475860. Its totient is φ = 1364485621680.

The previous prime is 1387227048749. The next prime is 1387227048787. The reversal of 1387227048769 is 9678407227831.

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 220535430544 + 1166691618225 = 469612^2 + 1080135^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387227048769 - 2⁹ = 1387227048257 is a prime.

It is a super-2 number, since 2×1387227048769² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1387227048769.

It is not an unprimeable number, because it can be changed into a prime (1387227048719) 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, 11370713454 + ... + 11370713575.

It is an arithmetic number, because the mean of its divisors is an integer number (352492118965).

Almost surely, 2^{1387227048769} is an apocalyptic number.

It is an amenable number.

1387227048769 is a deficient number, since it is larger than the sum of its proper divisors (22741427091).

1387227048769 is an equidigital number, since it uses as much as digits as its factorization.

1387227048769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22741427090.

The product of its (nonzero) digits is 56899584, while the sum is 64.

The spelling of 1387227048769 in words is "one trillion, three hundred eighty-seven billion, two hundred twenty-seven million, forty-eight thousand, seven hundred sixty-nine".