1386388877649 has 4 divisors (see below), whose sum is σ = 1848518503536. Its totient is φ = 924259251764.

The previous prime is 1386388877639. The next prime is 1386388877669. The reversal of 1386388877649 is 9467788836831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1386388877649 - 2⁴ = 1386388877633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1386388877639) 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, 231064812939 + ... + 231064812944.

It is an arithmetic number, because the mean of its divisors is an integer number (462129625884).

Almost surely, 2^{1386388877649} is an apocalyptic number.

It is an amenable number.

1386388877649 is a deficient number, since it is larger than the sum of its proper divisors (462129625887).

1386388877649 is an equidigital number, since it uses as much as digits as its factorization.

1386388877649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462129625886.

The product of its digits is 2341011456, while the sum is 78.

The spelling of 1386388877649 in words is "one trillion, three hundred eighty-six billion, three hundred eighty-eight million, eight hundred seventy-seven thousand, six hundred forty-nine".