40840017648 has 40 divisors (see below), whose sum is σ = 105549674448. Its totient is φ = 13607365632.

The previous prime is 40840017629. The next prime is 40840017683. The reversal of 40840017648 is 84671004804.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75465 + ... + 295592.

Almost surely, 2^40840017648 is an apocalyptic number.

40840017648 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40840017648 is an abundant number, since it is smaller than the sum of its proper divisors (64709656800).

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

40840017648 is a wasteful number, since it uses less digits than its factorization.

40840017648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373361 (or 373355 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 42.

The spelling of 40840017648 in words is "forty billion, eight hundred forty million, seventeen thousand, six hundred forty-eight".