61497823571 has 2 divisors, whose sum is σ = 61497823572. Its totient is φ = 61497823570.

The previous prime is 61497823567. The next prime is 61497823573. The reversal of 61497823571 is 17532879416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61497823571 - 2² = 61497823567 is a prime.

It is a Sophie Germain prime.

Together with 61497823573, 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 (61497823573) 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, 30748911785 + 30748911786.

It is an arithmetic number, because the mean of its divisors is an integer number (30748911786).

Almost surely, 2^61497823571 is an apocalyptic number.

61497823571 is a deficient number, since it is larger than the sum of its proper divisors (1).

61497823571 is an equidigital number, since it uses as much as digits as its factorization.

61497823571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 53.

The spelling of 61497823571 in words is "sixty-one billion, four hundred ninety-seven million, eight hundred twenty-three thousand, five hundred seventy-one".