4035861563891 has 2 divisors, whose sum is σ = 4035861563892. Its totient is φ = 4035861563890.

The previous prime is 4035861563869. The next prime is 4035861563969. The reversal of 4035861563891 is 1983651685304.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4035861563891 - 2⁶ = 4035861563827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4035861563891.

It is not a weakly prime, because it can be changed into another prime (4035861563791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2017930781945 + 2017930781946.

It is an arithmetic number, because the mean of its divisors is an integer number (2017930781946).

Almost surely, 2^{4035861563891} is an apocalyptic number.

4035861563891 is a deficient number, since it is larger than the sum of its proper divisors (1).

4035861563891 is an equidigital number, since it uses as much as digits as its factorization.

4035861563891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18662400, while the sum is 59.

The spelling of 4035861563891 in words is "four trillion, thirty-five billion, eight hundred sixty-one million, five hundred sixty-three thousand, eight hundred ninety-one".