40809164947 has 2 divisors, whose sum is σ = 40809164948. Its totient is φ = 40809164946.

The previous prime is 40809164881. The next prime is 40809164951. The reversal of 40809164947 is 74946190804.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40809164947 - 2²⁷ = 40674947219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40809164894 and 40809164903.

It is not a weakly prime, because it can be changed into another prime (40809164447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20404582473 + 20404582474.

It is an arithmetic number, because the mean of its divisors is an integer number (20404582474).

Almost surely, 2^40809164947 is an apocalyptic number.

40809164947 is a deficient number, since it is larger than the sum of its proper divisors (1).

40809164947 is an equidigital number, since it uses as much as digits as its factorization.

40809164947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 40809164947 in words is "forty billion, eight hundred nine million, one hundred sixty-four thousand, nine hundred forty-seven".