53543227640 has 64 divisors (see below), whose sum is σ = 137905459200. Its totient is φ = 18327961728.

The previous prime is 53543227631. The next prime is 53543227643. The reversal of 53543227640 is 4672234535.

It is a happy number.

It is a super-2 number, since 2×53543227640² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53543227643) 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, 18857 + ... + 327783.

It is an arithmetic number, because the mean of its divisors is an integer number (2154772800).

Almost surely, 2^53543227640 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 53543227640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68952729600).

53543227640 is an abundant number, since it is smaller than the sum of its proper divisors (84362231560).

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

53543227640 is a wasteful number, since it uses less digits than its factorization.

53543227640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309564 (or 309560 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 41.

The spelling of 53543227640 in words is "fifty-three billion, five hundred forty-three million, two hundred twenty-seven thousand, six hundred forty".