4661631791 has 2 divisors, whose sum is σ = 4661631792. Its totient is φ = 4661631790.

The previous prime is 4661631787. The next prime is 4661631803. The reversal of 4661631791 is 1971361664.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4661631791 - 2² = 4661631787 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4661633791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2330815895 + 2330815896.

It is an arithmetic number, because the mean of its divisors is an integer number (2330815896).

Almost surely, 2^4661631791 is an apocalyptic number.

4661631791 is a deficient number, since it is larger than the sum of its proper divisors (1).

4661631791 is an equidigital number, since it uses as much as digits as its factorization.

4661631791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The square root of 4661631791 is about 68276.1436447607. The cubic root of 4661631791 is about 1670.4981113009.

The spelling of 4661631791 in words is "four billion, six hundred sixty-one million, six hundred thirty-one thousand, seven hundred ninety-one".