99897706173456 has 135 divisors (see below), whose sum is σ = 287347890031293. Its totient is φ = 32397816792960.

The previous prime is 99897706173449. The next prime is 99897706173469. The reversal of 99897706173456 is 65437160779899.

The square root of 99897706173456 is 9994884.

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

99897706173456 is a `hidden beast` number, since 9 + 9 + 8 + 97 + 7 + 0 + 6 + 1 + 73 + 456 = 666.

It can be written as a sum of positive squares in only one way, i.e., 89389839344400 + 10507866829056 = 9454620^2 + 3241584^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4437717241 + ... + 4437739751.

Almost surely, 2^{99897706173456} is an apocalyptic number.

99897706173456 is the 9994884-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99897706173456

99897706173456 is an abundant number, since it is smaller than the sum of its proper divisors (187450183857837).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99897706173456 is an frugal number, since it uses more digits than its factorization.

99897706173456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45110 (or 22553 counting only the distinct ones).

The product of its (nonzero) digits is 4320812160, while the sum is 81.

The spelling of 99897706173456 in words is "ninety-nine trillion, eight hundred ninety-seven billion, seven hundred six million, one hundred seventy-three thousand, four hundred fifty-six".