40306542613 has 2 divisors, whose sum is σ = 40306542614. Its totient is φ = 40306542612.

The previous prime is 40306542607. The next prime is 40306542631. The reversal of 40306542613 is 31624560304.

Together with next prime (40306542631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38235109444 + 2071433169 = 195538^2 + 45513^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40306542613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40306542413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20153271306 + 20153271307.

It is an arithmetic number, because the mean of its divisors is an integer number (20153271307).

Almost surely, 2^40306542613 is an apocalyptic number.

It is an amenable number.

40306542613 is a deficient number, since it is larger than the sum of its proper divisors (1).

40306542613 is an equidigital number, since it uses as much as digits as its factorization.

40306542613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 34.

The spelling of 40306542613 in words is "forty billion, three hundred six million, five hundred forty-two thousand, six hundred thirteen".