40155471409 has 2 divisors, whose sum is σ = 40155471410. Its totient is φ = 40155471408.

The previous prime is 40155471379. The next prime is 40155471427. The reversal of 40155471409 is 90417455104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34082698225 + 6072773184 = 184615^2 + 77928^2 .

It is a cyclic number.

It is not a de Polignac number, because 40155471409 - 2¹³ = 40155463217 is a prime.

It is a super-2 number, since 2×40155471409² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40155421409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20077735704 + 20077735705.

It is an arithmetic number, because the mean of its divisors is an integer number (20077735705).

Almost surely, 2^40155471409 is an apocalyptic number.

It is an amenable number.

40155471409 is a deficient number, since it is larger than the sum of its proper divisors (1).

40155471409 is an equidigital number, since it uses as much as digits as its factorization.

40155471409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 40155471409 in words is "forty billion, one hundred fifty-five million, four hundred seventy-one thousand, four hundred nine".