1378831262649 has 8 divisors (see below), whose sum is σ = 1839019640832. Its totient is φ = 918931863120.

The previous prime is 1378831262639. The next prime is 1378831262687. The reversal of 1378831262649 is 9462621388731.

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

It is not a de Polignac number, because 1378831262649 - 2¹⁷ = 1378831131577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1378831262592 and 1378831262601.

It is not an unprimeable number, because it can be changed into a prime (1378831262639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72233529 + ... + 72252614.

It is an arithmetic number, because the mean of its divisors is an integer number (229877455104).

Almost surely, 2^{1378831262649} is an apocalyptic number.

It is an amenable number.

1378831262649 is a deficient number, since it is larger than the sum of its proper divisors (460188378183).

1378831262649 is a wasteful number, since it uses less digits than its factorization.

1378831262649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144489327.

The product of its digits is 20901888, while the sum is 60.

The spelling of 1378831262649 in words is "one trillion, three hundred seventy-eight billion, eight hundred thirty-one million, two hundred sixty-two thousand, six hundred forty-nine".