845490534131 has 2 divisors, whose sum is σ = 845490534132. Its totient is φ = 845490534130.

The previous prime is 845490534079. The next prime is 845490534137. The reversal of 845490534131 is 131435094548.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 845490534131 - 2¹⁴ = 845490517747 is a prime.

It is a super-2 number, since 2×845490534131² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (845490534137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422745267065 + 422745267066.

It is an arithmetic number, because the mean of its divisors is an integer number (422745267066).

Almost surely, 2^845490534131 is an apocalyptic number.

845490534131 is a deficient number, since it is larger than the sum of its proper divisors (1).

845490534131 is an equidigital number, since it uses as much as digits as its factorization.

845490534131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 845490534131 in words is "eight hundred forty-five billion, four hundred ninety million, five hundred thirty-four thousand, one hundred thirty-one".