84144974725249 has 3 divisors (see below), whose sum is σ = 84144983898307. Its totient is φ = 84144965552192.

The previous prime is 84144974725247. The next prime is 84144974725271. The reversal of 84144974725249 is 94252747944148.

The square root of 84144974725249 is 9173057.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 37146780225 + 84107827945024 = 192735^2 + 9171032^2 .

It is not a de Polignac number, because 84144974725249 - 2¹ = 84144974725247 is a prime.

It is a super-2 number, since 2×84144974725249² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84144974725247) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4586529 + ... + 13759585.

Almost surely, 2^{84144974725249} is an apocalyptic number.

84144974725249 is the 9173057-th square number.

84144974725249 is the 4586529-th centered octagonal number.

It is an amenable number.

84144974725249 is a deficient number, since it is larger than the sum of its proper divisors (9173058).

84144974725249 is an frugal number, since it uses more digits than its factorization.

84144974725249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18346114 (or 9173057 counting only the distinct ones).

The product of its digits is 650280960, while the sum is 70.

The spelling of 84144974725249 in words is "eighty-four trillion, one hundred forty-four billion, nine hundred seventy-four million, seven hundred twenty-five thousand, two hundred forty-nine".