53987166989 has 4 divisors (see below), whose sum is σ = 61699619424. Its totient is φ = 46274714556.

The previous prime is 53987166953. The next prime is 53987166997. The reversal of 53987166989 is 98966178935.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 53987166989 - 2⁸ = 53987166733 is a prime.

It is a super-2 number, since 2×53987166989² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53987166589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3856226207 + ... + 3856226220.

It is an arithmetic number, because the mean of its divisors is an integer number (15424904856).

Almost surely, 2^53987166989 is an apocalyptic number.

It is an amenable number.

53987166989 is a deficient number, since it is larger than the sum of its proper divisors (7712452435).

53987166989 is an equidigital number, since it uses as much as digits as its factorization.

53987166989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7712452434.

The product of its digits is 176359680, while the sum is 71.

The spelling of 53987166989 in words is "fifty-three billion, nine hundred eighty-seven million, one hundred sixty-six thousand, nine hundred eighty-nine".