61773798407 has 2 divisors, whose sum is σ = 61773798408. Its totient is φ = 61773798406.

The previous prime is 61773798379. The next prime is 61773798413. The reversal of 61773798407 is 70489737716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61773798407 - 2⁶ = 61773798343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61773798607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30886899203 + 30886899204.

It is an arithmetic number, because the mean of its divisors is an integer number (30886899204).

Almost surely, 2^61773798407 is an apocalyptic number.

61773798407 is a deficient number, since it is larger than the sum of its proper divisors (1).

61773798407 is an equidigital number, since it uses as much as digits as its factorization.

61773798407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12446784, while the sum is 59.

The spelling of 61773798407 in words is "sixty-one billion, seven hundred seventy-three million, seven hundred ninety-eight thousand, four hundred seven".