52991999989 has 4 divisors (see below), whose sum is σ = 55781052640. Its totient is φ = 50202947340.

The previous prime is 52991999941. The next prime is 52991999993. The reversal of 52991999989 is 98999919925.

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 a cyclic number.

It is not a de Polignac number, because 52991999989 - 2⁷ = 52991999861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52991099989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1394526297 + ... + 1394526334.

It is an arithmetic number, because the mean of its divisors is an integer number (13945263160).

Almost surely, 2^52991999989 is an apocalyptic number.

It is an amenable number.

52991999989 is a deficient number, since it is larger than the sum of its proper divisors (2789052651).

52991999989 is a wasteful number, since it uses less digits than its factorization.

52991999989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2789052650.

The product of its digits is 382637520, while the sum is 79.

The spelling of 52991999989 in words is "fifty-two billion, nine hundred ninety-one million, nine hundred ninety-nine thousand, nine hundred eighty-nine".