61298823217 has 2 divisors, whose sum is σ = 61298823218. Its totient is φ = 61298823216.

The previous prime is 61298823163. The next prime is 61298823239. The reversal of 61298823217 is 71232889216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49925880481 + 11372942736 = 223441^2 + 106644^2 .

It is a cyclic number.

It is not a de Polignac number, because 61298823217 - 2¹¹ = 61298821169 is a prime.

It is not a weakly prime, because it can be changed into another prime (61298823277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30649411608 + 30649411609.

It is an arithmetic number, because the mean of its divisors is an integer number (30649411609).

Almost surely, 2^61298823217 is an apocalyptic number.

It is an amenable number.

61298823217 is a deficient number, since it is larger than the sum of its proper divisors (1).

61298823217 is an equidigital number, since it uses as much as digits as its factorization.

61298823217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 49.

The spelling of 61298823217 in words is "sixty-one billion, two hundred ninety-eight million, eight hundred twenty-three thousand, two hundred seventeen".