188000988993 has 12 divisors (see below), whose sum is σ = 271873864548. Its totient is φ = 125187740160.

The previous prime is 188000988991. The next prime is 188000988997. The reversal of 188000988993 is 399889000881.

It can be written as a sum of positive squares in 2 ways, for example, as 108630886464 + 79370102529 = 329592^2 + 281727^2 .

It is not a de Polignac number, because 188000988993 - 2¹ = 188000988991 is a prime.

It is a super-2 number, since 2×188000988993² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 188000988993.

It is not an unprimeable number, because it can be changed into a prime (188000988991) 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, 12179568 + ... + 12194993.

It is an arithmetic number, because the mean of its divisors is an integer number (22656155379).

Almost surely, 2^188000988993 is an apocalyptic number.

It is an amenable number.

188000988993 is a deficient number, since it is larger than the sum of its proper divisors (83872875555).

188000988993 is a wasteful number, since it uses less digits than its factorization.

188000988993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24375424 (or 24375421 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 63.

The spelling of 188000988993 in words is "one hundred eighty-eight billion, nine hundred eighty-eight thousand, nine hundred ninety-three".