649452244996 has 9 divisors (see below), whose sum is σ = 1136544249351. Its totient is φ = 324725316612.

The previous prime is 649452244939. The next prime is 649452244997. The reversal of 649452244996 is 699442254946.

The square root of 649452244996 is 805886.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649452244997) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1410301 + ... + 1813243.

Almost surely, 2^649452244996 is an apocalyptic number.

649452244996 is the 805886-th square number.

It is an amenable number.

649452244996 is a deficient number, since it is larger than the sum of its proper divisors (487092004355).

649452244996 is an frugal number, since it uses more digits than its factorization.

649452244996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805890 (or 402945 counting only the distinct ones).

The product of its digits is 134369280, while the sum is 64.

Multiplying 649452244996 by its sum of digits (64), we get a square (41564943679744 = 6447088²).

The spelling of 649452244996 in words is "six hundred forty-nine billion, four hundred fifty-two million, two hundred forty-four thousand, nine hundred ninety-six".