653640122 has 8 divisors (see below), whose sum is σ = 1004373972. Its totient is φ = 318848800.

The previous prime is 653640107. The next prime is 653640131. The reversal of 653640122 is 221046356.

It can be written as a sum of positive squares in 2 ways, for example, as 647142721 + 6497401 = 25439^2 + 2549^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3985529 + ... + 3985692.

Almost surely, 2^653640122 is an apocalyptic number.

653640122 is a deficient number, since it is larger than the sum of its proper divisors (350733850).

653640122 is a wasteful number, since it uses less digits than its factorization.

653640122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7971264.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 653640122 is about 25566.3865651758. The cubic root of 653640122 is about 867.8531299918.

Adding to 653640122 its reverse (221046356), we get a palindrome (874686478).

The spelling of 653640122 in words is "six hundred fifty-three million, six hundred forty thousand, one hundred twenty-two".