653421639025 has 27 divisors (see below), whose sum is σ = 814621524483. Its totient is φ = 519927504000.

The previous prime is 653421639011. The next prime is 653421639083. The reversal of 653421639025 is 520936124356.

The square root of 653421639025 is 808345.

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

It can be written as a sum of positive squares in 13 ways, for example, as 507546530929 + 145875108096 = 712423^2 + 381936^2 .

It is a de Polignac number, because none of the positive numbers 2^k-653421639025 is a prime.

It is a super-2 number, since 2×653421639025² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1087223725 + ... + 1087224325.

Almost surely, 2^653421639025 is an apocalyptic number.

653421639025 is the 808345-th square number.

653421639025 is the 404173-rd centered octagonal number.

It is an amenable number.

653421639025 is a deficient number, since it is larger than the sum of its proper divisors (161199885458).

653421639025 is an frugal number, since it uses more digits than its factorization.

653421639025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 653421639025 in words is "six hundred fifty-three billion, four hundred twenty-one million, six hundred thirty-nine thousand, twenty-five".