7346641781 has 2 divisors, whose sum is σ = 7346641782. Its totient is φ = 7346641780.

The previous prime is 7346641759. The next prime is 7346641837. The reversal of 7346641781 is 1871466437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7024116100 + 322525681 = 83810^2 + 17959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7346641781 is a prime.

It is a super-2 number, since 2×7346641781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7346641711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3673320890 + 3673320891.

It is an arithmetic number, because the mean of its divisors is an integer number (3673320891).

Almost surely, 2^7346641781 is an apocalyptic number.

It is an amenable number.

7346641781 is a deficient number, since it is larger than the sum of its proper divisors (1).

7346641781 is an equidigital number, since it uses as much as digits as its factorization.

7346641781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 47.

The square root of 7346641781 is about 85712.5532288007. The cubic root of 7346641781 is about 1944.0001232204. Note that the first 3 decimals are identical.

The spelling of 7346641781 in words is "seven billion, three hundred forty-six million, six hundred forty-one thousand, seven hundred eighty-one".