40178745547 has 2 divisors, whose sum is σ = 40178745548. Its totient is φ = 40178745546.

The previous prime is 40178745413. The next prime is 40178745583. The reversal of 40178745547 is 74554787104.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40178745547 - 2¹¹ = 40178743499 is a prime.

It is a super-2 number, since 2×40178745547² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40178745494 and 40178745503.

It is not a weakly prime, because it can be changed into another prime (40178745587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20089372773 + 20089372774.

It is an arithmetic number, because the mean of its divisors is an integer number (20089372774).

Almost surely, 2^40178745547 is an apocalyptic number.

40178745547 is a deficient number, since it is larger than the sum of its proper divisors (1).

40178745547 is an equidigital number, since it uses as much as digits as its factorization.

40178745547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4390400, while the sum is 52.

The spelling of 40178745547 in words is "forty billion, one hundred seventy-eight million, seven hundred forty-five thousand, five hundred forty-seven".