40445140513 has 2 divisors, whose sum is σ = 40445140514. Its totient is φ = 40445140512.

The previous prime is 40445140507. The next prime is 40445140523. The reversal of 40445140513 is 31504154404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26815045009 + 13630095504 = 163753^2 + 116748^2 .

It is a cyclic number.

It is not a de Polignac number, because 40445140513 - 2¹⁷ = 40445009441 is a prime.

It is a super-2 number, since 2×40445140513² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40445140523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20222570256 + 20222570257.

It is an arithmetic number, because the mean of its divisors is an integer number (20222570257).

Almost surely, 2^40445140513 is an apocalyptic number.

It is an amenable number.

40445140513 is a deficient number, since it is larger than the sum of its proper divisors (1).

40445140513 is an equidigital number, since it uses as much as digits as its factorization.

40445140513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 40445140513 its reverse (31504154404), we get a palindrome (71949294917).

The spelling of 40445140513 in words is "forty billion, four hundred forty-five million, one hundred forty thousand, five hundred thirteen".