61772775671723 has 2 divisors, whose sum is σ = 61772775671724. Its totient is φ = 61772775671722.

The previous prime is 61772775671627. The next prime is 61772775671749. The reversal of 61772775671723 is 32717657727716.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61772775671723 is a prime.

It is not a weakly prime, because it can be changed into another prime (61772775671023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30886387835861 + 30886387835862.

It is an arithmetic number, because the mean of its divisors is an integer number (30886387835862).

Almost surely, 2^{61772775671723} is an apocalyptic number.

61772775671723 is a deficient number, since it is larger than the sum of its proper divisors (1).

61772775671723 is an equidigital number, since it uses as much as digits as its factorization.

61772775671723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254121840, while the sum is 68.

The spelling of 61772775671723 in words is "sixty-one trillion, seven hundred seventy-two billion, seven hundred seventy-five million, six hundred seventy-one thousand, seven hundred twenty-three".