53521840961 has 8 divisors (see below), whose sum is σ = 53717794920. Its totient is φ = 53326046592.

The previous prime is 53521840891. The next prime is 53521840963. The reversal of 53521840961 is 16904812535.

It is a happy number.

53521840961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10257840961 + 43264000000 = 101281^2 + 208000^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53521840961 is a prime.

It is a super-3 number, since 3×53521840961³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53521840963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 654035 + ... + 731303.

It is an arithmetic number, because the mean of its divisors is an integer number (6714724365).

Almost surely, 2^53521840961 is an apocalyptic number.

It is an amenable number.

53521840961 is a deficient number, since it is larger than the sum of its proper divisors (195953959).

53521840961 is a wasteful number, since it uses less digits than its factorization.

53521840961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79795.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 53521840961 in words is "fifty-three billion, five hundred twenty-one million, eight hundred forty thousand, nine hundred sixty-one".