649176669897 has 32 divisors (see below), whose sum is σ = 990594367488. Its totient is φ = 370443632256.

The previous prime is 649176669887. The next prime is 649176669949. The reversal of 649176669897 is 798966671946.

It is a happy number.

It is not a de Polignac number, because 649176669897 - 2¹¹ = 649176667849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649176669847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69478008 + ... + 69487350.

It is an arithmetic number, because the mean of its divisors is an integer number (30956073984).

Almost surely, 2^649176669897 is an apocalyptic number.

It is an amenable number.

649176669897 is a deficient number, since it is larger than the sum of its proper divisors (341417697591).

649176669897 is a wasteful number, since it uses less digits than its factorization.

649176669897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13589.

The product of its digits is 1481421312, while the sum is 78.

The spelling of 649176669897 in words is "six hundred forty-nine billion, one hundred seventy-six million, six hundred sixty-nine thousand, eight hundred ninety-seven".