36405378663539 has 2 divisors, whose sum is σ = 36405378663540. Its totient is φ = 36405378663538.

The previous prime is 36405378663499. The next prime is 36405378663551. The reversal of 36405378663539 is 93536687350463.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36405378663539 is a prime.

It is not a weakly prime, because it can be changed into another prime (36405378663559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18202689331769 + 18202689331770.

It is an arithmetic number, because the mean of its divisors is an integer number (18202689331770).

Almost surely, 2^{36405378663539} is an apocalyptic number.

36405378663539 is a deficient number, since it is larger than the sum of its proper divisors (1).

36405378663539 is an equidigital number, since it uses as much as digits as its factorization.

36405378663539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 881798400, while the sum is 68.

The spelling of 36405378663539 in words is "thirty-six trillion, four hundred five billion, three hundred seventy-eight million, six hundred sixty-three thousand, five hundred thirty-nine".