188201389457 has 4 divisors (see below), whose sum is σ = 192578166000. Its totient is φ = 183824612916.

The previous prime is 188201389447. The next prime is 188201389459. The reversal of 188201389457 is 754983102881.

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 188201389457 - 2³⁰ = 187127647633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (188201389459) 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, 2188388207 + ... + 2188388292.

It is an arithmetic number, because the mean of its divisors is an integer number (48144541500).

Almost surely, 2^188201389457 is an apocalyptic number.

It is an amenable number.

188201389457 is a deficient number, since it is larger than the sum of its proper divisors (4376776543).

188201389457 is an equidigital number, since it uses as much as digits as its factorization.

188201389457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4376776542.

The product of its (nonzero) digits is 3870720, while the sum is 56.

The spelling of 188201389457 in words is "one hundred eighty-eight billion, two hundred one million, three hundred eighty-nine thousand, four hundred fifty-seven".