1438997812965 has 32 divisors (see below), whose sum is σ = 2558267907840. Its totient is φ = 767450628288.

The previous prime is 1438997812939. The next prime is 1438997813051. The reversal of 1438997812965 is 5692187998341.

1438997812965 is a `hidden beast` number, since 1 + 4 + 389 + 97 + 81 + 29 + 65 = 666.

It is not a de Polignac number, because 1438997812965 - 2¹⁰ = 1438997811941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1438997812893 and 1438997812902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13529784 + ... + 13635726.

It is an arithmetic number, because the mean of its divisors is an integer number (79945872120).

Almost surely, 2^{1438997812965} is an apocalyptic number.

1438997812965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1438997812965 is a deficient number, since it is larger than the sum of its proper divisors (1119270094875).

1438997812965 is a wasteful number, since it uses less digits than its factorization.

1438997812965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206570 (or 206564 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 72.

The spelling of 1438997812965 in words is "one trillion, four hundred thirty-eight billion, nine hundred ninety-seven million, eight hundred twelve thousand, nine hundred sixty-five".