61604613793 has 2 divisors, whose sum is σ = 61604613794. Its totient is φ = 61604613792.

The previous prime is 61604613769. The next prime is 61604613809. The reversal of 61604613793 is 39731640616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45955354384 + 15649259409 = 214372^2 + 125097^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61604613793 is a prime.

It is not a weakly prime, because it can be changed into another prime (61604613743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30802306896 + 30802306897.

It is an arithmetic number, because the mean of its divisors is an integer number (30802306897).

Almost surely, 2^61604613793 is an apocalyptic number.

It is an amenable number.

61604613793 is a deficient number, since it is larger than the sum of its proper divisors (1).

61604613793 is an equidigital number, since it uses as much as digits as its factorization.

61604613793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 46.

The spelling of 61604613793 in words is "sixty-one billion, six hundred four million, six hundred thirteen thousand, seven hundred ninety-three".