52661725720 has 32 divisors (see below), whose sum is σ = 118673215920. Its totient is φ = 21031920000.

The previous prime is 52661725679. The next prime is 52661725729. The reversal of 52661725720 is 2752716625.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52661725729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 998031 + ... + 1049470.

Almost surely, 2^52661725720 is an apocalyptic number.

It is an amenable number.

52661725720 is an abundant number, since it is smaller than the sum of its proper divisors (66011490200).

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

52661725720 is a wasteful number, since it uses less digits than its factorization.

52661725720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048155 (or 2048151 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 52661725720 in words is "fifty-two billion, six hundred sixty-one million, seven hundred twenty-five thousand, seven hundred twenty".