40161342320388 has 36 divisors (see below), whose sum is σ = 101519313334348. Its totient is φ = 13387066015680.

The previous prime is 40161342320387. The next prime is 40161342320399. The reversal of 40161342320388 is 88302324316104.

40161342320388 is a `hidden beast` number, since 4 + 0 + 1 + 6 + 1 + 34 + 232 + 0 + 388 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33535773656064 + 6625568664324 = 5791008^2 + 2574018^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×40161342320388² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40161342320387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8981718 + ... + 12688338.

Almost surely, 2^{40161342320388} is an apocalyptic number.

It is an amenable number.

40161342320388 is an abundant number, since it is smaller than the sum of its proper divisors (61357971013960).

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

40161342320388 is a wasteful number, since it uses less digits than its factorization.

40161342320388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4007604 (or 4007599 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 40161342320388 in words is "forty trillion, one hundred sixty-one billion, three hundred forty-two million, three hundred twenty thousand, three hundred eighty-eight".