53521166663520 has 192 divisors, whose sum is σ = 177478581579264. Its totient is φ = 13530963353600.

The previous prime is 53521166663513. The next prime is 53521166663537. The reversal of 53521166663520 is 2536666112535.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20203506 + ... + 22698545.

It is an arithmetic number, because the mean of its divisors is an integer number (924367612392).

Almost surely, 2^{53521166663520} is an apocalyptic number.

It is an amenable number.

53521166663520 is an abundant number, since it is smaller than the sum of its proper divisors (123957414915744).

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

53521166663520 is a wasteful number, since it uses less digits than its factorization.

53521166663520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42902205 (or 42902197 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 51.

The spelling of 53521166663520 in words is "fifty-three trillion, five hundred twenty-one billion, one hundred sixty-six million, six hundred sixty-three thousand, five hundred twenty".