61771532723 has 2 divisors, whose sum is σ = 61771532724. Its totient is φ = 61771532722.

The previous prime is 61771532717. The next prime is 61771532731. The reversal of 61771532723 is 32723517716.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61771532723 - 2⁶ = 61771532659 is a prime.

It is not a weakly prime, because it can be changed into another prime (61771532743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30885766361 + 30885766362.

It is an arithmetic number, because the mean of its divisors is an integer number (30885766362).

Almost surely, 2^61771532723 is an apocalyptic number.

61771532723 is a deficient number, since it is larger than the sum of its proper divisors (1).

61771532723 is an equidigital number, since it uses as much as digits as its factorization.

61771532723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 370440, while the sum is 44.

The spelling of 61771532723 in words is "sixty-one billion, seven hundred seventy-one million, five hundred thirty-two thousand, seven hundred twenty-three".