1649873456676 has 81 divisors (see below), whose sum is σ = 4215861913809. Its totient is φ = 544041531648.

The previous prime is 1649873456587. The next prime is 1649873456677. The reversal of 1649873456676 is 6766543789461.

The square root of 1649873456676 is 1284474.

It is a perfect power (a square), and thus also a powerful number.

1649873456676 is a `hidden beast` number, since 1 + 6 + 49 + 8 + 73 + 456 + 67 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 740856132900 + 909017323776 = 860730^2 + 953424^2 .

It is not an unprimeable number, because it can be changed into a prime (1649873456677) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 747562765 + ... + 747564971.

Almost surely, 2^{1649873456676} is an apocalyptic number.

1649873456676 is the 1284474-th square number.

It is an amenable number.

1649873456676 is an abundant number, since it is smaller than the sum of its proper divisors (2565988457133).

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

1649873456676 is an frugal number, since it uses more digits than its factorization.

1649873456676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4618 (or 2309 counting only the distinct ones).

The product of its digits is 1097349120, while the sum is 72.

The spelling of 1649873456676 in words is "one trillion, six hundred forty-nine billion, eight hundred seventy-three million, four hundred fifty-six thousand, six hundred seventy-six".