997119068650511 has 4 divisors (see below), whose sum is σ = 997814894938512. Its totient is φ = 996423242362512.

The previous prime is 997119068650501. The next prime is 997119068650517. The reversal of 997119068650511 is 115056860911799.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997119068650511 is a prime.

It is a super-2 number, since 2×997119068650511² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997119068650517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347913141851 + ... + 347913144716.

It is an arithmetic number, because the mean of its divisors is an integer number (249453723734628).

Almost surely, 2^{997119068650511} is an apocalyptic number.

997119068650511 is a deficient number, since it is larger than the sum of its proper divisors (695826288001).

997119068650511 is a wasteful number, since it uses less digits than its factorization.

997119068650511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695826288000.

The product of its (nonzero) digits is 36741600, while the sum is 68.

The spelling of 997119068650511 in words is "nine hundred ninety-seven trillion, one hundred nineteen billion, sixty-eight million, six hundred fifty thousand, five hundred eleven".