61497823573 has 2 divisors, whose sum is σ = 61497823574. Its totient is φ = 61497823572.

The previous prime is 61497823571. The next prime is 61497823609. The reversal of 61497823573 is 37532879416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61009988004 + 487835569 = 247002^2 + 22087^2 .

It is a cyclic number.

It is not a de Polignac number, because 61497823573 - 2¹ = 61497823571 is a prime.

Together with 61497823571, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61497823571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30748911786 + 30748911787.

It is an arithmetic number, because the mean of its divisors is an integer number (30748911787).

Almost surely, 2^61497823573 is an apocalyptic number.

It is an amenable number.

61497823573 is a deficient number, since it is larger than the sum of its proper divisors (1).

61497823573 is an equidigital number, since it uses as much as digits as its factorization.

61497823573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 55.

The spelling of 61497823573 in words is "sixty-one billion, four hundred ninety-seven million, eight hundred twenty-three thousand, five hundred seventy-three".