999997495371169 has 27 divisors (see below), whose sum is σ = 1066674064447443. Its totient is φ = 937297924680000.

The previous prime is 999997495371107. The next prime is 999997495371197. The reversal of 999997495371169 is 961173594799999.

The square root of 999997495371169 is 31622737.

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., 778544762832225 + 221452732538944 = 27902415^2 + 14881288^2 .

It is not a de Polignac number, because 999997495371169 - 2²⁵ = 999997461816737 is a prime.

It is a super-2 number, since 2×999997495371169² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999997495371569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 134934215074 + ... + 134934222484.

Almost surely, 2^{999997495371169} is an apocalyptic number.

999997495371169 is the 31622737-th square number.

999997495371169 is the 15811369-th centered octagonal number.

It is an amenable number.

999997495371169 is a deficient number, since it is larger than the sum of its proper divisors (66676569076274).

999997495371169 is an frugal number, since it uses more digits than its factorization.

999997495371169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15358 (or 7679 counting only the distinct ones).

The product of its digits is 84371573160, while the sum is 97.

The spelling of 999997495371169 in words is "nine hundred ninety-nine trillion, nine hundred ninety-seven billion, four hundred ninety-five million, three hundred seventy-one thousand, one hundred sixty-nine".