53665920018 has 24 divisors (see below), whose sum is σ = 116294899968. Its totient is φ = 17885756952.

The previous prime is 53665920017. The next prime is 53665920019. The reversal of 53665920018 is 81002956635.

53665920018 is a `hidden beast` number, since 53 + 6 + 6 + 592 + 0 + 0 + 1 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (53665920017) and next prime (53665920019).

It is not an unprimeable number, because it can be changed into a prime (53665920017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123946 + ... + 350277.

It is an arithmetic number, because the mean of its divisors is an integer number (4845620832).

Almost surely, 2^53665920018 is an apocalyptic number.

53665920018 is an abundant number, since it is smaller than the sum of its proper divisors (62628979950).

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

53665920018 is a wasteful number, since it uses less digits than its factorization.

53665920018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480518 (or 480515 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 53665920018 in words is "fifty-three billion, six hundred sixty-five million, nine hundred twenty thousand, eighteen".