999953670536617 has 4 divisors (see below), whose sum is σ = 999953740534996. Its totient is φ = 999953600538240.

The previous prime is 999953670536549. The next prime is 999953670536663. The reversal of 999953670536617 is 716635076359999.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 134598723585561 + 865354946951056 = 11601669^2 + 29416916^2 .

It is a cyclic number.

It is not a de Polignac number, because 999953670536617 - 2²⁷ = 999953536318889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999953670536017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4999884 + ... + 44998957.

It is an arithmetic number, because the mean of its divisors is an integer number (249988435133749).

It is a Poulet number, since it divides 2^{999953670536616}-1.

Almost surely, 2^{999953670536617} is an apocalyptic number.

999953670536617 is the 19999537-th heptagonal number.

It is an amenable number.

999953670536617 is a deficient number, since it is larger than the sum of its proper divisors (69998379).

999953670536617 is a wasteful number, since it uses less digits than its factorization.

999953670536617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69998378.

The product of its (nonzero) digits is 15624365400, while the sum is 85.

The spelling of 999953670536617 in words is "nine hundred ninety-nine trillion, nine hundred fifty-three billion, six hundred seventy million, five hundred thirty-six thousand, six hundred seventeen".