40399352608 has 36 divisors (see below), whose sum is σ = 81065404098. Its totient is φ = 19818506240.

The previous prime is 40399352603. The next prime is 40399352611. The reversal of 40399352608 is 80625399304.

It can be written as a sum of positive squares in 3 ways, for example, as 33742750864 + 6656601744 = 183692^2 + 81588^2 .

It is a super-2 number, since 2×40399352608² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40399352603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 134833 + ... + 314608.

Almost surely, 2^40399352608 is an apocalyptic number.

It is an amenable number.

40399352608 is an abundant number, since it is smaller than the sum of its proper divisors (40666051490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40399352608 is an equidigital number, since it uses as much as digits as its factorization.

40399352608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449557 (or 449496 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 40399352608 in words is "forty billion, three hundred ninety-nine million, three hundred fifty-two thousand, six hundred eight".