40040020513 has 2 divisors, whose sum is σ = 40040020514. Its totient is φ = 40040020512.

The previous prime is 40040020459. The next prime is 40040020561. The reversal of 40040020513 is 31502004004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39862917649 + 177102864 = 199657^2 + 13308^2 .

It is a cyclic number.

It is not a de Polignac number, because 40040020513 - 2²¹ = 40037923361 is a prime.

It is not a weakly prime, because it can be changed into another prime (40040020313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20020010256 + 20020010257.

It is an arithmetic number, because the mean of its divisors is an integer number (20020010257).

Almost surely, 2^40040020513 is an apocalyptic number.

It is an amenable number.

40040020513 is a deficient number, since it is larger than the sum of its proper divisors (1).

40040020513 is an equidigital number, since it uses as much as digits as its factorization.

40040020513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

Adding to 40040020513 its reverse (31502004004), we get a palindrome (71542024517).

The spelling of 40040020513 in words is "forty billion, forty million, twenty thousand, five hundred thirteen".