1438351671969 has 63 divisors (see below), whose sum is σ = 2209998825027. Its totient is φ = 935694408096.

The previous prime is 1438351671941. The next prime is 1438351672007. The reversal of 1438351671969 is 9691761538341.

It is a happy number.

The square root of 1438351671969 is 1199313.

It is a perfect power (a square), and thus also a powerful number.

1438351671969 is a `hidden beast` number, since 1 + 4 + 38 + 351 + 67 + 196 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1388661912225 + 49689759744 = 1178415^2 + 222912^2 .

It is not a de Polignac number, because 1438351671969 - 2⁵ = 1438351671937 is a prime.

It is a super-2 number, since 2×1438351671969² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1438351671919) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 1392401877 + ... + 1392402909.

It is an arithmetic number, because the mean of its divisors is an integer number (35079346429).

Almost surely, 2^{1438351671969} is an apocalyptic number.

1438351671969 is the 1199313-rd square number.

1438351671969 is the 599657-th centered octagonal number.

It is an amenable number.

1438351671969 is a deficient number, since it is larger than the sum of its proper divisors (771647153058).

1438351671969 is an frugal number, since it uses more digits than its factorization.

1438351671969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170 (or 1079 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The spelling of 1438351671969 in words is "one trillion, four hundred thirty-eight billion, three hundred fifty-one million, six hundred seventy-one thousand, nine hundred sixty-nine".