1641343651 has 2 divisors, whose sum is σ = 1641343652. Its totient is φ = 1641343650.

The previous prime is 1641343619. The next prime is 1641343661. The reversal of 1641343651 is 1563431461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1641343651 - 2⁵ = 1641343619 is a prime.

It is not a weakly prime, because it can be changed into another prime (1641343601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820671825 + 820671826.

It is an arithmetic number, because the mean of its divisors is an integer number (820671826).

Almost surely, 2^1641343651 is an apocalyptic number.

1641343651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641343651 is an equidigital number, since it uses as much as digits as its factorization.

1641343651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 1641343651 is about 40513.4996143261. The cubic root of 1641343651 is about 1179.5956794897.

The spelling of 1641343651 in words is "one billion, six hundred forty-one million, three hundred forty-three thousand, six hundred fifty-one".