40401131166 has 144 divisors (see below), whose sum is σ = 100667221200. Its totient is φ = 11686160640.

The previous prime is 40401131123. The next prime is 40401131167. The reversal of 40401131166 is 66113110404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40401131167) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5617825 + ... + 5625011.

It is an arithmetic number, because the mean of its divisors is an integer number (699077925).

Almost surely, 2^40401131166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40401131166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50333610600).

40401131166 is an abundant number, since it is smaller than the sum of its proper divisors (60266090034).

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

40401131166 is a wasteful number, since it uses less digits than its factorization.

40401131166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7335 (or 7321 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The spelling of 40401131166 in words is "forty billion, four hundred one million, one hundred thirty-one thousand, one hundred sixty-six".