53017820240 has 80 divisors (see below), whose sum is σ = 153682842240. Its totient is φ = 16525032960.

The previous prime is 53017820239. The next prime is 53017820249. The reversal of 53017820240 is 4202871035.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 53017820197 and 53017820206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53017820249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4297235 + ... + 4309554.

It is an arithmetic number, because the mean of its divisors is an integer number (1921035528).

Almost surely, 2^53017820240 is an apocalyptic number.

It is an amenable number.

53017820240 is an abundant number, since it is smaller than the sum of its proper divisors (100665022000).

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

53017820240 is a wasteful number, since it uses less digits than its factorization.

53017820240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8606820 (or 8606814 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The spelling of 53017820240 in words is "fifty-three billion, seventeen million, eight hundred twenty thousand, two hundred forty".