654525650 has 24 divisors (see below), whose sum is σ = 1259400420. Its totient is φ = 252781760.

The previous prime is 654525647. The next prime is 654525691. The reversal of 654525650 is 56525456.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 462121009 + 192404641 = 21497^2 + 13871^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224249 + ... + 227148.

Almost surely, 2^654525650 is an apocalyptic number.

654525650 is a deficient number, since it is larger than the sum of its proper divisors (604874770).

654525650 is a wasteful number, since it uses less digits than its factorization.

654525650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451438 (or 451433 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The square root of 654525650 is about 25583.6989116117. The cubic root of 654525650 is about 868.2448651544.

The spelling of 654525650 in words is "six hundred fifty-four million, five hundred twenty-five thousand, six hundred fifty".