61679084814749 has 2 divisors, whose sum is σ = 61679084814750. Its totient is φ = 61679084814748.

The previous prime is 61679084814707. The next prime is 61679084814769. The reversal of 61679084814749 is 94741848097616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54386465579524 + 7292619235225 = 7374718^2 + 2700485^2 .

It is a cyclic number.

It is not a de Polignac number, because 61679084814749 - 2⁸ = 61679084814493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61679084814769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30839542407374 + 30839542407375.

It is an arithmetic number, because the mean of its divisors is an integer number (30839542407375).

Almost surely, 2^{61679084814749} is an apocalyptic number.

It is an amenable number.

61679084814749 is a deficient number, since it is larger than the sum of its proper divisors (1).

61679084814749 is an equidigital number, since it uses as much as digits as its factorization.

61679084814749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 585252864, while the sum is 74.

The spelling of 61679084814749 in words is "sixty-one trillion, six hundred seventy-nine billion, eighty-four million, eight hundred fourteen thousand, seven hundred forty-nine".