40045918169 has 2 divisors, whose sum is σ = 40045918170. Its totient is φ = 40045918168.

The previous prime is 40045918153. The next prime is 40045918183. The reversal of 40045918169 is 96181954004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39934826569 + 111091600 = 199837^2 + 10540^2 .

It is a cyclic number.

It is not a de Polignac number, because 40045918169 - 2⁴ = 40045918153 is a prime.

It is a super-3 number, since 3×40045918169³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (40045918109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20022959084 + 20022959085.

It is an arithmetic number, because the mean of its divisors is an integer number (20022959085).

Almost surely, 2^40045918169 is an apocalyptic number.

It is an amenable number.

40045918169 is a deficient number, since it is larger than the sum of its proper divisors (1).

40045918169 is an equidigital number, since it uses as much as digits as its factorization.

40045918169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 40045918169 in words is "forty billion, forty-five million, nine hundred eighteen thousand, one hundred sixty-nine".