53661359945886 has 384 divisors, whose sum is σ = 141102375321600. Its totient is φ = 13446698952960.

The previous prime is 53661359945863. The next prime is 53661359945909. The reversal of 53661359945886 is 68854995316635.

It is an interprime number because it is at equal distance from previous prime (53661359945863) and next prime (53661359945909).

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 191 ways as a sum of consecutive naturals, for example, 2517292900 + ... + 2517314216.

It is an arithmetic number, because the mean of its divisors is an integer number (367454102400).

Almost surely, 2^{53661359945886} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53661359945886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70551187660800).

53661359945886 is an abundant number, since it is smaller than the sum of its proper divisors (87441015375714).

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

53661359945886 is a wasteful number, since it uses less digits than its factorization.

53661359945886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21652 (or 21645 counting only the distinct ones).

The product of its digits is 5038848000, while the sum is 78.

The spelling of 53661359945886 in words is "fifty-three trillion, six hundred sixty-one billion, three hundred fifty-nine million, nine hundred forty-five thousand, eight hundred eighty-six".