653942650 has 12 divisors (see below), whose sum is σ = 1216333422. Its totient is φ = 261577040.

The previous prime is 653942633. The next prime is 653942651. The reversal of 653942650 is 56249356.

It can be written as a sum of positive squares in 3 ways, for example, as 547419609 + 106523041 = 23397^2 + 10321^2 .

It is not an unprimeable number, because it can be changed into a prime (653942651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6539377 + ... + 6539476.

Almost surely, 2^653942650 is an apocalyptic number.

653942650 is a deficient number, since it is larger than the sum of its proper divisors (562390772).

653942650 is a wasteful number, since it uses less digits than its factorization.

653942650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13078865 (or 13078860 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 653942650 is about 25572.3023992757. The cubic root of 653942650 is about 867.9870004849.

The spelling of 653942650 in words is "six hundred fifty-three million, nine hundred forty-two thousand, six hundred fifty".