40692208385 has 4 divisors (see below), whose sum is σ = 48830650068. Its totient is φ = 32553766704.

The previous prime is 40692208309. The next prime is 40692208387. The reversal of 40692208385 is 58380229604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24074935921 + 16617272464 = 155161^2 + 128908^2 .

It is a cyclic number.

It is not a de Polignac number, because 40692208385 - 2²⁶ = 40625099521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40692208387) 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 in 3 ways as a sum of consecutive naturals, for example, 4069220834 + ... + 4069220843.

It is an arithmetic number, because the mean of its divisors is an integer number (12207662517).

Almost surely, 2^40692208385 is an apocalyptic number.

It is an amenable number.

40692208385 is a deficient number, since it is larger than the sum of its proper divisors (8138441683).

40692208385 is an equidigital number, since it uses as much as digits as its factorization.

40692208385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8138441682.

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 40692208385 in words is "forty billion, six hundred ninety-two million, two hundred eight thousand, three hundred eighty-five".