53785685553 has 8 divisors (see below), whose sum is σ = 72154212768. Its totient is φ = 35637141024.

The previous prime is 53785685539. The next prime is 53785685561. The reversal of 53785685553 is 35558658735.

It is a happy number.

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

It is not a de Polignac number, because 53785685553 - 2¹⁴ = 53785669169 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53785685533) 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, 54995100 + ... + 54996077.

It is an arithmetic number, because the mean of its divisors is an integer number (9019276596).

Almost surely, 2^53785685553 is an apocalyptic number.

It is an amenable number.

53785685553 is a deficient number, since it is larger than the sum of its proper divisors (18368527215).

53785685553 is a wasteful number, since it uses less digits than its factorization.

53785685553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109991343.

The product of its digits is 75600000, while the sum is 60.

It can be divided in two parts, 5378568 and 5553, that added together give a triangular number (5384121 = T₃₂₈₁).

The spelling of 53785685553 in words is "fifty-three billion, seven hundred eighty-five million, six hundred eighty-five thousand, five hundred fifty-three".