861540083683 has 2 divisors, whose sum is σ = 861540083684. Its totient is φ = 861540083682.

The previous prime is 861540083671. The next prime is 861540083687. The reversal of 861540083683 is 386380045168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 861540083683 - 2²¹ = 861537986531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 861540083683.

It is not a weakly prime, because it can be changed into another prime (861540083687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430770041841 + 430770041842.

It is an arithmetic number, because the mean of its divisors is an integer number (430770041842).

Almost surely, 2^861540083683 is an apocalyptic number.

861540083683 is a deficient number, since it is larger than the sum of its proper divisors (1).

861540083683 is an equidigital number, since it uses as much as digits as its factorization.

861540083683 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 861540083683 in words is "eight hundred sixty-one billion, five hundred forty million, eighty-three thousand, six hundred eighty-three".