208290006544 has 45 divisors (see below), whose sum is σ = 409580786671. Its totient is φ = 102614277920.

The previous prime is 208290006541. The next prime is 208290006611. The reversal of 208290006544 is 445600092802.

The square root of 208290006544 is 456388.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 208290006497 and 208290006506.

It is not an unprimeable number, because it can be changed into a prime (208290006541) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 129613389 + ... + 129614995.

Almost surely, 2^208290006544 is an apocalyptic number.

208290006544 is the 456388-th square number.

It is an amenable number.

208290006544 is a deficient number, since it is larger than the sum of its proper divisors (201290780127).

208290006544 is an frugal number, since it uses more digits than its factorization.

208290006544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364 (or 1680 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 208290006544 in words is "two hundred eight billion, two hundred ninety million, six thousand, five hundred forty-four".