53661524320020 has 24 divisors (see below), whose sum is σ = 150252268096224. Its totient is φ = 14309739818656.

The previous prime is 53661524320007. The next prime is 53661524320043. The reversal of 53661524320020 is 2002342516635.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447179369274 + ... + 447179369393.

It is an arithmetic number, because the mean of its divisors is an integer number (6260511170676).

Almost surely, 2^{53661524320020} is an apocalyptic number.

It is an amenable number.

53661524320020 is an abundant number, since it is smaller than the sum of its proper divisors (96590743776204).

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

53661524320020 is a wasteful number, since it uses less digits than its factorization.

53661524320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894358738679 (or 894358738677 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

Adding to 53661524320020 its reverse (2002342516635), we get a palindrome (55663866836655).

The spelling of 53661524320020 in words is "fifty-three trillion, six hundred sixty-one billion, five hundred twenty-four million, three hundred twenty thousand, twenty".