1396646887945 has 16 divisors (see below), whose sum is σ = 1680541356672. Its totient is φ = 1114275398400.

The previous prime is 1396646887943. The next prime is 1396646887973. The reversal of 1396646887945 is 5497886466931.

It is not a de Polignac number, because 1396646887945 - 2¹ = 1396646887943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1396646887943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8910724 + ... + 9066106.

It is an arithmetic number, because the mean of its divisors is an integer number (105033834792).

Almost surely, 2^{1396646887945} is an apocalyptic number.

It is an amenable number.

1396646887945 is a deficient number, since it is larger than the sum of its proper divisors (283894468727).

1396646887945 is a wasteful number, since it uses less digits than its factorization.

1396646887945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160272.

The product of its digits is 1881169920, while the sum is 76.

The spelling of 1396646887945 in words is "one trillion, three hundred ninety-six billion, six hundred forty-six million, eight hundred eighty-seven thousand, nine hundred forty-five".