53185399989 has 8 divisors (see below), whose sum is σ = 72251864352. Its totient is φ = 34787934480.

The previous prime is 53185399973. The next prime is 53185399999. The reversal of 53185399989 is 98999358135.

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

It is not a de Polignac number, because 53185399989 - 2⁴ = 53185399973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53185399919) 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, 167249527 + ... + 167249844.

It is an arithmetic number, because the mean of its divisors is an integer number (9031483044).

Almost surely, 2^53185399989 is an apocalyptic number.

It is an amenable number.

53185399989 is a deficient number, since it is larger than the sum of its proper divisors (19066464363).

53185399989 is a wasteful number, since it uses less digits than its factorization.

53185399989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334499427.

The product of its digits is 94478400, while the sum is 69.

The spelling of 53185399989 in words is "fifty-three billion, one hundred eighty-five million, three hundred ninety-nine thousand, nine hundred eighty-nine".