40445172613 has 8 divisors (see below), whose sum is σ = 40733590040. Its totient is φ = 40157752320.

The previous prime is 40445172577. The next prime is 40445172629. The reversal of 40445172613 is 31627154404.

40445172613 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 6970079169 + 33475093444 = 83487^2 + 182962^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40445172613 - 2³³ = 31855238021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40443172613) 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, 167778 + ... + 330211.

It is an arithmetic number, because the mean of its divisors is an integer number (5091698755).

Almost surely, 2^40445172613 is an apocalyptic number.

It is an amenable number.

40445172613 is a deficient number, since it is larger than the sum of its proper divisors (288417427).

40445172613 is a wasteful number, since it uses less digits than its factorization.

40445172613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498567.

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 40445172613 in words is "forty billion, four hundred forty-five million, one hundred seventy-two thousand, six hundred thirteen".