999999961946176 has 63 divisors (see below), whose sum is σ = 2005092503239917. Its totient is φ = 494833198848000.

The previous prime is 999999961946143. The next prime is 999999961946189. The reversal of 999999961946176 is 671649169999999.

The square root of 999999961946176 is 31622776.

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., 449038137870400 + 550961824075776 = 21190520^2 + 23472576^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 24539253801 + ... + 24539294551.

Almost surely, 2^{999999961946176} is an apocalyptic number.

999999961946176 is the 31622776-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999999961946176

999999961946176 is an abundant number, since it is smaller than the sum of its proper divisors (1005092541293741).

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

999999961946176 is an frugal number, since it uses more digits than its factorization.

999999961946176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81708 (or 40850 counting only the distinct ones).

The product of its digits is 260346568608, while the sum is 103.

The spelling of 999999961946176 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred sixty-one million, nine hundred forty-six thousand, one hundred seventy-six".