653428738647 has 24 divisors (see below), whose sum is σ = 961903719920. Its totient is φ = 427336715520.

The previous prime is 653428738637. The next prime is 653428738649. The reversal of 653428738647 is 746837824356.

653428738647 is a `hidden beast` number, since 6 + 534 + 2 + 8 + 7 + 38 + 64 + 7 = 666.

It is not a de Polignac number, because 653428738647 - 2¹¹ = 653428736599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653428738649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2102872 + ... + 2393517.

Almost surely, 2^653428738647 is an apocalyptic number.

653428738647 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

653428738647 is a deficient number, since it is larger than the sum of its proper divisors (308474981273).

653428738647 is a wasteful number, since it uses less digits than its factorization.

653428738647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4496703 (or 4496700 counting only the distinct ones).

The product of its digits is 162570240, while the sum is 63.

The spelling of 653428738647 in words is "six hundred fifty-three billion, four hundred twenty-eight million, seven hundred thirty-eight thousand, six hundred forty-seven".