40045918168 has 8 divisors (see below), whose sum is σ = 75086096580. Its totient is φ = 20022959080.

The previous prime is 40045918153. The next prime is 40045918169. The reversal of 40045918168 is 86181954004.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40045918169) 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 as a sum of consecutive naturals, namely, 2502869878 + ... + 2502869893.

Almost surely, 2^40045918168 is an apocalyptic number.

It is an amenable number.

40045918168 is a deficient number, since it is larger than the sum of its proper divisors (35040178412).

40045918168 is a wasteful number, since it uses less digits than its factorization.

40045918168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005739777 (or 5005739773 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 40045918168 in words is "forty billion, forty-five million, nine hundred eighteen thousand, one hundred sixty-eight".