649176669977 has 16 divisors (see below), whose sum is σ = 736409162880. Its totient is φ = 566857804800.

The previous prime is 649176669949. The next prime is 649176670019. The reversal of 649176669977 is 779966671946.

It is a cyclic number.

It is not a de Polignac number, because 649176669977 - 2¹⁶ = 649176604441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 649176669898 and 649176669907.

It is not an unprimeable number, because it can be changed into a prime (649176639977) 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 15 ways as a sum of consecutive naturals, for example, 5210549 + ... + 5333682.

It is an arithmetic number, because the mean of its divisors is an integer number (46025572680).

Almost surely, 2^649176669977 is an apocalyptic number.

It is an amenable number.

649176669977 is a deficient number, since it is larger than the sum of its proper divisors (87232492903).

649176669977 is a wasteful number, since it uses less digits than its factorization.

649176669977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10544464.

The product of its digits is 1296243648, while the sum is 77.

The spelling of 649176669977 in words is "six hundred forty-nine billion, one hundred seventy-six million, six hundred sixty-nine thousand, nine hundred seventy-seven".