40188198660 has 24 divisors (see below), whose sum is σ = 112526956416. Its totient is φ = 10716852960.

The previous prime is 40188198649. The next prime is 40188198667. The reversal of 40188198660 is 6689188104.

It is not an unprimeable number, because it can be changed into a prime (40188198667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334901596 + ... + 334901715.

It is an arithmetic number, because the mean of its divisors is an integer number (4688623184).

Almost surely, 2^40188198660 is an apocalyptic number.

It is an amenable number.

40188198660 is an abundant number, since it is smaller than the sum of its proper divisors (72338757756).

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

40188198660 is a wasteful number, since it uses less digits than its factorization.

40188198660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669803323 (or 669803321 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 51.

The spelling of 40188198660 in words is "forty billion, one hundred eighty-eight million, one hundred ninety-eight thousand, six hundred sixty".