61820074571 has 2 divisors, whose sum is σ = 61820074572. Its totient is φ = 61820074570.

The previous prime is 61820074549. The next prime is 61820074573. The reversal of 61820074571 is 17547002816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61820074571 - 2¹⁸ = 61819812427 is a prime.

Together with 61820074573, 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 (61820074573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30910037285 + 30910037286.

It is an arithmetic number, because the mean of its divisors is an integer number (30910037286).

Almost surely, 2^61820074571 is an apocalyptic number.

61820074571 is a deficient number, since it is larger than the sum of its proper divisors (1).

61820074571 is an equidigital number, since it uses as much as digits as its factorization.

61820074571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 41.

The spelling of 61820074571 in words is "sixty-one billion, eight hundred twenty million, seventy-four thousand, five hundred seventy-one".