40661373128 has 32 divisors (see below), whose sum is σ = 78669745560. Its totient is φ = 19690014720.

The previous prime is 40661373121. The next prime is 40661373161. The reversal of 40661373128 is 82137316604.

40661373128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 22446631684 + 18214741444 = 149822^2 + 134962^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (40661373121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407501 + ... + 497372.

Almost surely, 2^40661373128 is an apocalyptic number.

It is an amenable number.

40661373128 is a deficient number, since it is larger than the sum of its proper divisors (38008372432).

40661373128 is a wasteful number, since it uses less digits than its factorization.

40661373128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905057 (or 905053 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 40661373128 in words is "forty billion, six hundred sixty-one million, three hundred seventy-three thousand, one hundred twenty-eight".