999998656123701 has 8 divisors (see below), whose sum is σ = 1435895506228960. Its totient is φ = 615383788383792.

The previous prime is 999998656123679. The next prime is 999998656123717. The reversal of 999998656123701 is 107321656899999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 999998656123701 - 2⁶ = 999998656123637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999998656123601) 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, 12820495591291 + ... + 12820495591368.

It is an arithmetic number, because the mean of its divisors is an integer number (179486938278620).

Almost surely, 2^{999998656123701} is an apocalyptic number.

It is an amenable number.

999998656123701 is a deficient number, since it is larger than the sum of its proper divisors (435896850105259).

999998656123701 is a wasteful number, since it uses less digits than its factorization.

999998656123701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25640991182675.

The product of its (nonzero) digits is 3571283520, while the sum is 84.

The spelling of 999998656123701 in words is "nine hundred ninety-nine trillion, nine hundred ninety-eight billion, six hundred fifty-six million, one hundred twenty-three thousand, seven hundred one".