40815371819 has 2 divisors, whose sum is σ = 40815371820. Its totient is φ = 40815371818.

The previous prime is 40815371803. The next prime is 40815371827. The reversal of 40815371819 is 91817351804.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40815371819 - 2⁴ = 40815371803 is a prime.

It is a super-2 number, since 2×40815371819² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (40815371879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20407685909 + 20407685910.

It is an arithmetic number, because the mean of its divisors is an integer number (20407685910).

Almost surely, 2^40815371819 is an apocalyptic number.

40815371819 is a deficient number, since it is larger than the sum of its proper divisors (1).

40815371819 is an equidigital number, since it uses as much as digits as its factorization.

40815371819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 47.

The spelling of 40815371819 in words is "forty billion, eight hundred fifteen million, three hundred seventy-one thousand, eight hundred nineteen".