40120339969 has 2 divisors, whose sum is σ = 40120339970. Its totient is φ = 40120339968.

The previous prime is 40120339967. The next prime is 40120340021. The reversal of 40120339969 is 96993302104.

40120339969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21996449344 + 18123890625 = 148312^2 + 134625^2 .

It is a cyclic number.

It is not a de Polignac number, because 40120339969 - 2¹ = 40120339967 is a prime.

It is a super-2 number, since 2×40120339969² (a number of 22 digits) contains 22 as substring.

Together with 40120339967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40120339967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20060169984 + 20060169985.

It is an arithmetic number, because the mean of its divisors is an integer number (20060169985).

Almost surely, 2^40120339969 is an apocalyptic number.

It is an amenable number.

40120339969 is a deficient number, since it is larger than the sum of its proper divisors (1).

40120339969 is an equidigital number, since it uses as much as digits as its factorization.

40120339969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 46.

The spelling of 40120339969 in words is "forty billion, one hundred twenty million, three hundred thirty-nine thousand, nine hundred sixty-nine".