649471836492 has 72 divisors (see below), whose sum is σ = 1742096721456. Its totient is φ = 203309927424.

The previous prime is 649471836463. The next prime is 649471836521. The reversal of 649471836492 is 294638174946.

It is a happy number.

649471836492 is a `hidden beast` number, since 6 + 49 + 4 + 71 + 8 + 36 + 492 = 666.

It is an interprime number because it is at equal distance from previous prime (649471836463) and next prime (649471836521).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 881398 + ... + 1440765.

It is an arithmetic number, because the mean of its divisors is an integer number (24195787798).

Almost surely, 2^649471836492 is an apocalyptic number.

It is an amenable number.

649471836492 is an abundant number, since it is smaller than the sum of its proper divisors (1092624884964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649471836492 is a wasteful number, since it uses less digits than its factorization.

649471836492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2322647 (or 2322642 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 63.

The spelling of 649471836492 in words is "six hundred forty-nine billion, four hundred seventy-one million, eight hundred thirty-six thousand, four hundred ninety-two".