1672187783161 has 9 divisors (see below), whose sum is σ = 1945208563311. Its totient is φ = 1433296055352.

The previous prime is 1672187783113. The next prime is 1672187783173. The reversal of 1672187783161 is 1613877812761.

The square root of 1672187783161 is 1293131.

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

It can be written as a sum of positive squares in only one way, i.e., 562207538025 + 1109980245136 = 749805^2 + 1053556^2 .

It is not a de Polignac number, because 1672187783161 - 2¹¹ = 1672187781113 is a prime.

It is a super-3 number, since 3×1672187783161³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1672187783096 and 1672187783105.

It is not an unprimeable number, because it can be changed into a prime (1672187783261) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8959551 + ... + 9144283.

Almost surely, 2^{1672187783161} is an apocalyptic number.

1672187783161 is the 1293131-st square number.

1672187783161 is the 646566-th centered octagonal number.

It is an amenable number.

1672187783161 is a deficient number, since it is larger than the sum of its proper divisors (273020780150).

1672187783161 is an frugal number, since it uses more digits than its factorization.

1672187783161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369480 (or 184740 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 58.

The spelling of 1672187783161 in words is "one trillion, six hundred seventy-two billion, one hundred eighty-seven million, seven hundred eighty-three thousand, one hundred sixty-one".