40388509136 has 20 divisors (see below), whose sum is σ = 80367676452. Its totient is φ = 19648463616.

The previous prime is 40388509103. The next prime is 40388509157. The reversal of 40388509136 is 63190588304.

It can be written as a sum of positive squares in 2 ways, for example, as 22158108736 + 18230400400 = 148856^2 + 135020^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34111325 + ... + 34112508.

Almost surely, 2^40388509136 is an apocalyptic number.

It is an amenable number.

40388509136 is a deficient number, since it is larger than the sum of its proper divisors (39979167316).

40388509136 is a wasteful number, since it uses less digits than its factorization.

40388509136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68223878 (or 68223872 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 40388509136 in words is "forty billion, three hundred eighty-eight million, five hundred nine thousand, one hundred thirty-six".