999998611402456 has 32 divisors (see below), whose sum is σ = 1876723542429840. Its totient is φ = 499539022777728.

The previous prime is 999998611402451. The next prime is 999998611402501. The reversal of 999998611402456 is 654204116899999.

999998611402456 is a nontrivial binomial coefficient, being equal to C(44721329, 2).

It is a self number, because there is not a number n which added to its sum of digits gives 999998611402456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999998611402451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356373091 + ... + 359168173.

Almost surely, 2^{999998611402456} is an apocalyptic number.

999998611402456 is the 44721328-th triangular number.

999998611402456 is the 14907110-th centered nonagonal number.

It is an amenable number.

999998611402456 is a deficient number, since it is larger than the sum of its proper divisors (876724931027384).

999998611402456 is a wasteful number, since it uses less digits than its factorization.

999998611402456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836243 (or 2836239 counting only the distinct ones).

The product of its (nonzero) digits is 2720977920, while the sum is 82.

The spelling of 999998611402456 in words is "nine hundred ninety-nine trillion, nine hundred ninety-eight billion, six hundred eleven million, four hundred two thousand, four hundred fifty-six".