61922970617 has 2 divisors, whose sum is σ = 61922970618. Its totient is φ = 61922970616.

The previous prime is 61922970581. The next prime is 61922970647. The reversal of 61922970617 is 71607922916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35047958521 + 26875012096 = 187211^2 + 163936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61922970617 is a prime.

It is not a weakly prime, because it can be changed into another prime (61922970647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30961485308 + 30961485309.

It is an arithmetic number, because the mean of its divisors is an integer number (30961485309).

Almost surely, 2^61922970617 is an apocalyptic number.

It is an amenable number.

61922970617 is a deficient number, since it is larger than the sum of its proper divisors (1).

61922970617 is an equidigital number, since it uses as much as digits as its factorization.

61922970617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 50.

The spelling of 61922970617 in words is "sixty-one billion, nine hundred twenty-two million, nine hundred seventy thousand, six hundred seventeen".