84963025216521 has 15 divisors (see below), whose sum is σ = 126920198630973. Its totient is φ = 56641961505780.

The previous prime is 84963025216463. The next prime is 84963025216547. The reversal of 84963025216521 is 12561252036948.

The square root of 84963025216521 is 9217539.

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

84963025216521 is a `hidden beast` number, since 8 + 4 + 9 + 6 + 30 + 2 + 521 + 65 + 21 = 666.

It is not a de Polignac number, because 84963025216521 - 2⁹ = 84963025216009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84963025216571) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 82445766 + ... + 83469936.

Almost surely, 2^{84963025216521} is an apocalyptic number.

84963025216521 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

84963025216521 is the 9217539-th square number.

84963025216521 is the 4608770-th centered octagonal number.

It is an amenable number.

84963025216521 is a deficient number, since it is larger than the sum of its proper divisors (41957173414452).

84963025216521 is an frugal number, since it uses more digits than its factorization.

84963025216521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048354 (or 1024174 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 84963025216521 in words is "eighty-four trillion, nine hundred sixty-three billion, twenty-five million, two hundred sixteen thousand, five hundred twenty-one".