188429806845 has 128 divisors (see below), whose sum is σ = 426697113600. Its totient is φ = 76805231616.

The previous prime is 188429806843. The next prime is 188429806861. The reversal of 188429806845 is 548608924881.

It is not a de Polignac number, because 188429806845 - 2¹ = 188429806843 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188429806843) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3429 + ... + 613898.

It is an arithmetic number, because the mean of its divisors is an integer number (3333571200).

Almost surely, 2^188429806845 is an apocalyptic number.

188429806845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

188429806845 is an abundant number, since it is smaller than the sum of its proper divisors (238267306755).

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

188429806845 is a wasteful number, since it uses less digits than its factorization.

188429806845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617384 (or 617378 counting only the distinct ones).

The product of its (nonzero) digits is 35389440, while the sum is 63.

The spelling of 188429806845 in words is "one hundred eighty-eight billion, four hundred twenty-nine million, eight hundred six thousand, eight hundred forty-five".