1641354675749 has 2 divisors, whose sum is σ = 1641354675750. Its totient is φ = 1641354675748.

The previous prime is 1641354675707. The next prime is 1641354675773. The reversal of 1641354675749 is 9475764531461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1163399532100 + 477955143649 = 1078610^2 + 691343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1641354675749 is a prime.

It is a super-2 number, since 2×1641354675749² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1641354675691 and 1641354675700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1641354678749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820677337874 + 820677337875.

It is an arithmetic number, because the mean of its divisors is an integer number (820677337875).

Almost surely, 2^{1641354675749} is an apocalyptic number.

It is an amenable number.

1641354675749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641354675749 is an equidigital number, since it uses as much as digits as its factorization.

1641354675749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76204800, while the sum is 62.

The spelling of 1641354675749 in words is "one trillion, six hundred forty-one billion, three hundred fifty-four million, six hundred seventy-five thousand, seven hundred forty-nine".