7658201861 has 2 divisors, whose sum is σ = 7658201862. Its totient is φ = 7658201860.

The previous prime is 7658201833. The next prime is 7658201867. The reversal of 7658201861 is 1681028567.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5780712961 + 1877488900 = 76031^2 + 43330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7658201861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7658201867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3829100930 + 3829100931.

It is an arithmetic number, because the mean of its divisors is an integer number (3829100931).

Almost surely, 2^7658201861 is an apocalyptic number.

It is an amenable number.

7658201861 is a deficient number, since it is larger than the sum of its proper divisors (1).

7658201861 is an equidigital number, since it uses as much as digits as its factorization.

7658201861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 7658201861 is about 87511.1527806599. The cubic root of 7658201861 is about 1971.1012644931.

The spelling of 7658201861 in words is "seven billion, six hundred fifty-eight million, two hundred one thousand, eight hundred sixty-one".