61098986593 has 2 divisors, whose sum is σ = 61098986594. Its totient is φ = 61098986592.

The previous prime is 61098986569. The next prime is 61098986623. The reversal of 61098986593 is 39568989016.

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., 49311975969 + 11787010624 = 222063^2 + 108568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61098986593 is a prime.

It is not a weakly prime, because it can be changed into another prime (61098986393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30549493296 + 30549493297.

It is an arithmetic number, because the mean of its divisors is an integer number (30549493297).

Almost surely, 2^61098986593 is an apocalyptic number.

It is an amenable number.

61098986593 is a deficient number, since it is larger than the sum of its proper divisors (1).

61098986593 is an equidigital number, since it uses as much as digits as its factorization.

61098986593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25194240, while the sum is 64.

The spelling of 61098986593 in words is "sixty-one billion, ninety-eight million, nine hundred eighty-six thousand, five hundred ninety-three".