53403544165530 has 256 divisors, whose sum is σ = 140068958109696. Its totient is φ = 12952873866240.

The previous prime is 53403544165403. The next prime is 53403544165567. The reversal of 53403544165530 is 3556144530435.

It is a self number, because there is not a number n which added to its sum of digits gives 53403544165530.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4214621095 + ... + 4214633765.

It is an arithmetic number, because the mean of its divisors is an integer number (547144367616).

Almost surely, 2^{53403544165530} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53403544165530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70034479054848).

53403544165530 is an abundant number, since it is smaller than the sum of its proper divisors (86665413944166).

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

53403544165530 is a wasteful number, since it uses less digits than its factorization.

53403544165530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13421.

The product of its (nonzero) digits is 6480000, while the sum is 48.

Adding to 53403544165530 its reverse (3556144530435), we get a palindrome (56959688695965).

The spelling of 53403544165530 in words is "fifty-three trillion, four hundred three billion, five hundred forty-four million, one hundred sixty-five thousand, five hundred thirty".