53645161640 has 256 divisors, whose sum is σ = 150736896000. Its totient is φ = 16765056000.

The previous prime is 53645161637. The next prime is 53645161673. The reversal of 53645161640 is 4616154635.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 71431265 + ... + 71432015.

It is an arithmetic number, because the mean of its divisors is an integer number (588816000).

Almost surely, 2^53645161640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53645161640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75368448000).

53645161640 is an abundant number, since it is smaller than the sum of its proper divisors (97091734360).

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

53645161640 is a wasteful number, since it uses less digits than its factorization.

53645161640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280 (or 1276 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 53645161640 in words is "fifty-three billion, six hundred forty-five million, one hundred sixty-one thousand, six hundred forty".