40989638488 has 16 divisors (see below), whose sum is σ = 76914575280. Its totient is φ = 20479085088.

The previous prime is 40989638477. The next prime is 40989638489. The reversal of 40989638488 is 88483698904.

40989638488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40989638488² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40989638489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1955695 + ... + 1976542.

It is an arithmetic number, because the mean of its divisors is an integer number (4807160955).

Almost surely, 2^40989638488 is an apocalyptic number.

It is an amenable number.

40989638488 is a deficient number, since it is larger than the sum of its proper divisors (35924936792).

40989638488 is a wasteful number, since it uses less digits than its factorization.

40989638488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3933546 (or 3933542 counting only the distinct ones).

The product of its (nonzero) digits is 95551488, while the sum is 67.

The spelling of 40989638488 in words is "forty billion, nine hundred eighty-nine million, six hundred thirty-eight thousand, four hundred eighty-eight".