61713020767 has 2 divisors, whose sum is σ = 61713020768. Its totient is φ = 61713020766.

The previous prime is 61713020711. The next prime is 61713020857. The reversal of 61713020767 is 76702031716.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61713020767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61713060767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30856510383 + 30856510384.

It is an arithmetic number, because the mean of its divisors is an integer number (30856510384).

Almost surely, 2^61713020767 is an apocalyptic number.

61713020767 is a deficient number, since it is larger than the sum of its proper divisors (1).

61713020767 is an equidigital number, since it uses as much as digits as its factorization.

61713020767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74088, while the sum is 40.

The spelling of 61713020767 in words is "sixty-one billion, seven hundred thirteen million, twenty thousand, seven hundred sixty-seven".