40155471457 has 2 divisors, whose sum is σ = 40155471458. Its totient is φ = 40155471456.

The previous prime is 40155471427. The next prime is 40155471493. The reversal of 40155471457 is 75417455104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38101478416 + 2053993041 = 195196^2 + 45321^2 .

It is a cyclic number.

It is not a de Polignac number, because 40155471457 - 2³⁵ = 5795733089 is a prime.

It is a super-2 number, since 2×40155471457² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40155471427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20077735728 + 20077735729.

It is an arithmetic number, because the mean of its divisors is an integer number (20077735729).

Almost surely, 2^40155471457 is an apocalyptic number.

It is an amenable number.

40155471457 is a deficient number, since it is larger than the sum of its proper divisors (1).

40155471457 is an equidigital number, since it uses as much as digits as its factorization.

40155471457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392000, while the sum is 43.

The spelling of 40155471457 in words is "forty billion, one hundred fifty-five million, four hundred seventy-one thousand, four hundred fifty-seven".