40316615821 has 2 divisors, whose sum is σ = 40316615822. Its totient is φ = 40316615820.

The previous prime is 40316615753. The next prime is 40316615851. The reversal of 40316615821 is 12851661304.

It is a happy number.

40316615821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29381730921 + 10934884900 = 171411^2 + 104570^2 .

It is a cyclic number.

It is not a de Polignac number, because 40316615821 - 2¹³ = 40316607629 is a prime.

It is a super-2 number, since 2×40316615821² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40316615851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20158307910 + 20158307911.

It is an arithmetic number, because the mean of its divisors is an integer number (20158307911).

Almost surely, 2^40316615821 is an apocalyptic number.

It is an amenable number.

40316615821 is a deficient number, since it is larger than the sum of its proper divisors (1).

40316615821 is an equidigital number, since it uses as much as digits as its factorization.

40316615821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 40316615821 in words is "forty billion, three hundred sixteen million, six hundred fifteen thousand, eight hundred twenty-one".