461620861591 has 2 divisors, whose sum is σ = 461620861592. Its totient is φ = 461620861590.

The previous prime is 461620861531. The next prime is 461620861619. The reversal of 461620861591 is 195168026164.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 461620861591 - 2³¹ = 459473377943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (461620861501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230810430795 + 230810430796.

It is an arithmetic number, because the mean of its divisors is an integer number (230810430796).

Almost surely, 2^461620861591 is an apocalyptic number.

461620861591 is a deficient number, since it is larger than the sum of its proper divisors (1).

461620861591 is an equidigital number, since it uses as much as digits as its factorization.

461620861591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 461620861591 in words is "four hundred sixty-one billion, six hundred twenty million, eight hundred sixty-one thousand, five hundred ninety-one".