61888874491 has 2 divisors, whose sum is σ = 61888874492. Its totient is φ = 61888874490.

The previous prime is 61888874441. The next prime is 61888874533. The reversal of 61888874491 is 19447888816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61888874491 - 2¹⁹ = 61888350203 is a prime.

It is not a weakly prime, because it can be changed into another prime (61888874441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30944437245 + 30944437246.

It is an arithmetic number, because the mean of its divisors is an integer number (30944437246).

Almost surely, 2^61888874491 is an apocalyptic number.

61888874491 is a deficient number, since it is larger than the sum of its proper divisors (1).

61888874491 is an equidigital number, since it uses as much as digits as its factorization.

61888874491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24772608, while the sum is 64.

The spelling of 61888874491 in words is "sixty-one billion, eight hundred eighty-eight million, eight hundred seventy-four thousand, four hundred ninety-one".