1380641787946 has 8 divisors (see below), whose sum is σ = 2071379473380. Its totient is φ = 690181963488.

The previous prime is 1380641787911. The next prime is 1380641787983. The reversal of 1380641787946 is 6497871460831.

It can be written as a sum of positive squares in 2 ways, for example, as 1278168174721 + 102473613225 = 1130561^2 + 320115^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69452821 + ... + 69472696.

Almost surely, 2^{1380641787946} is an apocalyptic number.

1380641787946 is a deficient number, since it is larger than the sum of its proper divisors (690737685434).

1380641787946 is a wasteful number, since it uses less digits than its factorization.

1380641787946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138930488.

The product of its (nonzero) digits is 48771072, while the sum is 64.

The spelling of 1380641787946 in words is "one trillion, three hundred eighty billion, six hundred forty-one million, seven hundred eighty-seven thousand, nine hundred forty-six".