1380640128429 has 8 divisors (see below), whose sum is σ = 1841253447712. Its totient is φ = 920226780720.

The previous prime is 1380640128403. The next prime is 1380640128457. The reversal of 1380640128429 is 9248210460831.

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

It is not a de Polignac number, because 1380640128429 - 2¹⁵ = 1380640095661 is a prime.

It is a super-2 number, since 2×1380640128429² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380640168429) 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, 49976782 + ... + 50004399.

It is an arithmetic number, because the mean of its divisors is an integer number (230156680964).

Almost surely, 2^{1380640128429} is an apocalyptic number.

It is an amenable number.

1380640128429 is a deficient number, since it is larger than the sum of its proper divisors (460613319283).

1380640128429 is an equidigital number, since it uses as much as digits as its factorization.

1380640128429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99985787.

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 1380640128429 in words is "one trillion, three hundred eighty billion, six hundred forty million, one hundred twenty-eight thousand, four hundred twenty-nine".