61245394577 has 2 divisors, whose sum is σ = 61245394578. Its totient is φ = 61245394576.

The previous prime is 61245394517. The next prime is 61245394579. The reversal of 61245394577 is 77549354216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59457457921 + 1787936656 = 243839^2 + 42284^2 .

It is a cyclic number.

It is not a de Polignac number, because 61245394577 - 2³⁰ = 60171652753 is a prime.

Together with 61245394579, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61245394579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30622697288 + 30622697289.

It is an arithmetic number, because the mean of its divisors is an integer number (30622697289).

Almost surely, 2^61245394577 is an apocalyptic number.

It is an amenable number.

61245394577 is a deficient number, since it is larger than the sum of its proper divisors (1).

61245394577 is an equidigital number, since it uses as much as digits as its factorization.

61245394577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6350400, while the sum is 53.

The spelling of 61245394577 in words is "sixty-one billion, two hundred forty-five million, three hundred ninety-four thousand, five hundred seventy-seven".