53720332578 has 24 divisors (see below), whose sum is σ = 126975332016. Its totient is φ = 16278888600.

The previous prime is 53720332577. The next prime is 53720332657. The reversal of 53720332578 is 87523302735.

53720332578 is a `hidden beast` number, since 5 + 3 + 72 + 0 + 3 + 3 + 2 + 578 = 666.

It is not an unprimeable number, because it can be changed into a prime (53720332577) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 135657208 + ... + 135657603.

It is an arithmetic number, because the mean of its divisors is an integer number (5290638834).

Almost surely, 2^53720332578 is an apocalyptic number.

53720332578 is an abundant number, since it is smaller than the sum of its proper divisors (73254999438).

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

53720332578 is a wasteful number, since it uses less digits than its factorization.

53720332578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271314830 (or 271314827 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 45.

The spelling of 53720332578 in words is "fifty-three billion, seven hundred twenty million, three hundred thirty-two thousand, five hundred seventy-eight".