53641021640 has 16 divisors (see below), whose sum is σ = 120692298780. Its totient is φ = 21456408640.

The previous prime is 53641021607. The next prime is 53641021663. The reversal of 53641021640 is 4612014635.

It can be written as a sum of positive squares in 2 ways, for example, as 49354176964 + 4286844676 = 222158^2 + 65474^2 .

It is a junction number, because it is equal to n+sod(n) for n = 53641021597 and 53641021606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670512731 + ... + 670512810.

Almost surely, 2^53641021640 is an apocalyptic number.

It is an amenable number.

53641021640 is an abundant number, since it is smaller than the sum of its proper divisors (67051277140).

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

53641021640 is a wasteful number, since it uses less digits than its factorization.

53641021640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341025552 (or 1341025548 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 53641021640 in words is "fifty-three billion, six hundred forty-one million, twenty-one thousand, six hundred forty".