7782645061 has 2 divisors, whose sum is σ = 7782645062. Its totient is φ = 7782645060.

The previous prime is 7782645019. The next prime is 7782645089. The reversal of 7782645061 is 1605462877.

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., 7781004100 + 1640961 = 88210^2 + 1281^2 .

It is a cyclic number.

It is not a de Polignac number, because 7782645061 - 2¹⁷ = 7782513989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7782645961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3891322530 + 3891322531.

It is an arithmetic number, because the mean of its divisors is an integer number (3891322531).

Almost surely, 2^7782645061 is an apocalyptic number.

It is an amenable number.

7782645061 is a deficient number, since it is larger than the sum of its proper divisors (1).

7782645061 is an equidigital number, since it uses as much as digits as its factorization.

7782645061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 46.

The square root of 7782645061 is about 88219.3009550631. The cubic root of 7782645061 is about 1981.7205278563.

The spelling of 7782645061 in words is "seven billion, seven hundred eighty-two million, six hundred forty-five thousand, sixty-one".