471491601851 has 2 divisors, whose sum is σ = 471491601852. Its totient is φ = 471491601850.

The previous prime is 471491601821. The next prime is 471491601869. The reversal of 471491601851 is 158106194174.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 471491601851 - 2¹⁸ = 471491339707 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 471491601796 and 471491601805.

It is not a weakly prime, because it can be changed into another prime (471491601821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235745800925 + 235745800926.

It is an arithmetic number, because the mean of its divisors is an integer number (235745800926).

Almost surely, 2^471491601851 is an apocalyptic number.

471491601851 is a deficient number, since it is larger than the sum of its proper divisors (1).

471491601851 is an equidigital number, since it uses as much as digits as its factorization.

471491601851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 47.

The spelling of 471491601851 in words is "four hundred seventy-one billion, four hundred ninety-one million, six hundred one thousand, eight hundred fifty-one".