653428738648 has 32 divisors (see below), whose sum is σ = 1445372328960. Its totient is φ = 271007310240.

The previous prime is 653428738637. The next prime is 653428738649. The reversal of 653428738648 is 846837824356.

It is a happy number.

It is a super-2 number, since 2×653428738648² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 653428738648.

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 7 ways as a sum of consecutive naturals, for example, 188197786 + ... + 188201257.

It is an arithmetic number, because the mean of its divisors is an integer number (45167885280).

Almost surely, 2^653428738648 is an apocalyptic number.

It is an amenable number.

653428738648 is an abundant number, since it is smaller than the sum of its proper divisors (791943590312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

653428738648 is a wasteful number, since it uses less digits than its factorization.

653428738648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376399087 (or 376399083 counting only the distinct ones).

The product of its digits is 185794560, while the sum is 64.

The spelling of 653428738648 in words is "six hundred fifty-three billion, four hundred twenty-eight million, seven hundred thirty-eight thousand, six hundred forty-eight".