40445501641 has 4 divisors (see below), whose sum is σ = 40446193300. Its totient is φ = 40444809984.

The previous prime is 40445501497. The next prime is 40445501653. The reversal of 40445501641 is 14610554404.

40445501641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30915837241 + 9529664400 = 175829^2 + 97620^2 .

It is a cyclic number.

It is not a de Polignac number, because 40445501641 - 2²¹ = 40443404489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40445501597 and 40445501606.

It is not an unprimeable number, because it can be changed into a prime (40445501141) 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, 249096 + ... + 378073.

It is an arithmetic number, because the mean of its divisors is an integer number (10111548325).

Almost surely, 2^40445501641 is an apocalyptic number.

It is an amenable number.

40445501641 is a deficient number, since it is larger than the sum of its proper divisors (691659).

40445501641 is an equidigital number, since it uses as much as digits as its factorization.

40445501641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691658.

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 40445501641 in words is "forty billion, four hundred forty-five million, five hundred one thousand, six hundred forty-one".