84669942361 has 27 divisors (see below), whose sum is σ = 88877809503. Its totient is φ = 80659933200.

The previous prime is 84669942359. The next prime is 84669942367. The reversal of 84669942361 is 16324996648.

The square root of 84669942361 is 290981.

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., 81349877961 + 3320064400 = 285219^2 + 57620^2 .

It is not a de Polignac number, because 84669942361 - 2¹ = 84669942359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84669942296 and 84669942305.

It is not an unprimeable number, because it can be changed into a prime (84669942367) 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, 838316211 + ... + 838316311.

Almost surely, 2^84669942361 is an apocalyptic number.

84669942361 is the 290981-st square number.

84669942361 is the 145491-st centered octagonal number.

It is an amenable number.

84669942361 is a deficient number, since it is larger than the sum of its proper divisors (4207867142).

84669942361 is an frugal number, since it uses more digits than its factorization.

84669942361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 211 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 58.

The spelling of 84669942361 in words is "eighty-four billion, six hundred sixty-nine million, nine hundred forty-two thousand, three hundred sixty-one".