188378625834 has 256 divisors, whose sum is σ = 495328296960. Its totient is φ = 51962757120.

The previous prime is 188378625821. The next prime is 188378625857. The reversal of 188378625834 is 438526873881.

188378625834 is a `hidden beast` number, since 1 + 8 + 8 + 378 + 6 + 258 + 3 + 4 = 666.

It is a super-2 number, since 2×188378625834² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 491850007 + ... + 491850389.

It is an arithmetic number, because the mean of its divisors is an integer number (1934876160).

Almost surely, 2^188378625834 is an apocalyptic number.

188378625834 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 188378625834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247664148480).

188378625834 is an abundant number, since it is smaller than the sum of its proper divisors (306949671126).

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

188378625834 is a wasteful number, since it uses less digits than its factorization.

188378625834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802 (or 796 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 63.

The spelling of 188378625834 in words is "one hundred eighty-eight billion, three hundred seventy-eight million, six hundred twenty-five thousand, eight hundred thirty-four".