40869115997 has 2 divisors, whose sum is σ = 40869115998. Its totient is φ = 40869115996.

The previous prime is 40869115993. The next prime is 40869116083. The reversal of 40869115997 is 79951196804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36749273401 + 4119842596 = 191701^2 + 64186^2 .

It is a cyclic number.

It is not a de Polignac number, because 40869115997 - 2² = 40869115993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40869115993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20434557998 + 20434557999.

It is an arithmetic number, because the mean of its divisors is an integer number (20434557999).

Almost surely, 2^40869115997 is an apocalyptic number.

It is an amenable number.

40869115997 is a deficient number, since it is larger than the sum of its proper divisors (1).

40869115997 is an equidigital number, since it uses as much as digits as its factorization.

40869115997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 59.

The spelling of 40869115997 in words is "forty billion, eight hundred sixty-nine million, one hundred fifteen thousand, nine hundred ninety-seven".