188142503406 has 64 divisors (see below), whose sum is σ = 442823383296. Its totient is φ = 52537478400.

The previous prime is 188142503401. The next prime is 188142503429. The reversal of 188142503406 is 604305241881.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188142503401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 316866 + ... + 690426.

It is an arithmetic number, because the mean of its divisors is an integer number (6919115364).

Almost surely, 2^188142503406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 188142503406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221411691648).

188142503406 is an abundant number, since it is smaller than the sum of its proper divisors (254680879890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

188142503406 is a wasteful number, since it uses less digits than its factorization.

188142503406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374177.

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 188142503406 in words is "one hundred eighty-eight billion, one hundred forty-two million, five hundred three thousand, four hundred six".