1865949013807 has 2 divisors, whose sum is σ = 1865949013808. Its totient is φ = 1865949013806.

The previous prime is 1865949013769. The next prime is 1865949013813. The reversal of 1865949013807 is 7083109495681.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1865949013807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1865949013867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932974506903 + 932974506904.

It is an arithmetic number, because the mean of its divisors is an integer number (932974506904).

Almost surely, 2^{1865949013807} is an apocalyptic number.

1865949013807 is a deficient number, since it is larger than the sum of its proper divisors (1).

1865949013807 is an equidigital number, since it uses as much as digits as its factorization.

1865949013807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 1865949013807 in words is "one trillion, eight hundred sixty-five billion, nine hundred forty-nine million, thirteen thousand, eight hundred seven".