40438236762128 has 10 divisors (see below), whose sum is σ = 78349083726654. Its totient is φ = 20219118381056.

The previous prime is 40438236762109. The next prime is 40438236762151. The reversal of 40438236762128 is 82126763283404.

It can be written as a sum of positive squares in only one way, i.e., 32132935262464 + 8305301499664 = 5668592^2 + 2881892^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1263694898801 + ... + 1263694898832.

Almost surely, 2^{40438236762128} is an apocalyptic number.

It is an amenable number.

40438236762128 is a deficient number, since it is larger than the sum of its proper divisors (37910846964526).

40438236762128 is a wasteful number, since it uses less digits than its factorization.

40438236762128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527389797641 (or 2527389797635 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 56.

The spelling of 40438236762128 in words is "forty trillion, four hundred thirty-eight billion, two hundred thirty-six million, seven hundred sixty-two thousand, one hundred twenty-eight".