7042161649 has 2 divisors, whose sum is σ = 7042161650. Its totient is φ = 7042161648.

The previous prime is 7042161601. The next prime is 7042161713. The reversal of 7042161649 is 9461612407.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6681427600 + 360734049 = 81740^2 + 18993^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7042161649 is a prime.

It is not a weakly prime, because it can be changed into another prime (7042161449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3521080824 + 3521080825.

It is an arithmetic number, because the mean of its divisors is an integer number (3521080825).

Almost surely, 2^7042161649 is an apocalyptic number.

It is an amenable number.

7042161649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7042161649 is an equidigital number, since it uses as much as digits as its factorization.

7042161649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 7042161649 is about 83917.5884365131. The cubic root of 7042161649 is about 1916.7640850228.

The spelling of 7042161649 in words is "seven billion, forty-two million, one hundred sixty-one thousand, six hundred forty-nine".