1779547996009 has 27 divisors (see below), whose sum is σ = 2085703613847. Its totient is φ = 1513905171408.

The previous prime is 1779547996007. The next prime is 1779547996027. The reversal of 1779547996009 is 9006997459771.

The square root of 1779547996009 is 1333997.

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., 208486299609 + 1571061696400 = 456603^2 + 1253420^2 .

It is not a de Polignac number, because 1779547996009 - 2¹ = 1779547996007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1779547996001) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1391358232 + ... + 1391359510.

Almost surely, 2^{1779547996009} is an apocalyptic number.

1779547996009 is the 1333997-th square number.

1779547996009 is the 666999-th centered octagonal number.

It is an amenable number.

1779547996009 is a deficient number, since it is larger than the sum of its proper divisors (306155617838).

1779547996009 is an frugal number, since it uses more digits than its factorization.

1779547996009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870 (or 1435 counting only the distinct ones).

The product of its (nonzero) digits is 270050760, while the sum is 73.

It can be divided in two parts, 1779547 and 996009, that added together give a square (2775556 = 1666²).

The spelling of 1779547996009 in words is "one trillion, seven hundred seventy-nine billion, five hundred forty-seven million, nine hundred ninety-six thousand, nine".