61245394517 has 2 divisors, whose sum is σ = 61245394518. Its totient is φ = 61245394516.

The previous prime is 61245394499. The next prime is 61245394577. The reversal of 61245394517 is 71549354216.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59555033521 + 1690360996 = 244039^2 + 41114^2 .

It is a cyclic number.

It is not a de Polignac number, because 61245394517 - 2⁸ = 61245394261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61245394577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30622697258 + 30622697259.

It is an arithmetic number, because the mean of its divisors is an integer number (30622697259).

Almost surely, 2^61245394517 is an apocalyptic number.

It is an amenable number.

61245394517 is a deficient number, since it is larger than the sum of its proper divisors (1).

61245394517 is an equidigital number, since it uses as much as digits as its factorization.

61245394517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 47.

The spelling of 61245394517 in words is "sixty-one billion, two hundred forty-five million, three hundred ninety-four thousand, five hundred seventeen".