40040009957 has 2 divisors, whose sum is σ = 40040009958. Its totient is φ = 40040009956.

The previous prime is 40040009941. The next prime is 40040010041. The reversal of 40040009957 is 75990004004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39938423716 + 101586241 = 199846^2 + 10079^2 .

It is a cyclic number.

It is not a de Polignac number, because 40040009957 - 2⁴ = 40040009941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40040009957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40040009257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20020004978 + 20020004979.

It is an arithmetic number, because the mean of its divisors is an integer number (20020004979).

Almost surely, 2^40040009957 is an apocalyptic number.

It is an amenable number.

40040009957 is a deficient number, since it is larger than the sum of its proper divisors (1).

40040009957 is an equidigital number, since it uses as much as digits as its factorization.

40040009957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 40040009957 in words is "forty billion, forty million, nine thousand, nine hundred fifty-seven".