61466642731519 has 2 divisors, whose sum is σ = 61466642731520. Its totient is φ = 61466642731518.

The previous prime is 61466642731517. The next prime is 61466642731553. The reversal of 61466642731519 is 91513724666416.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61466642731519 - 2¹ = 61466642731517 is a prime.

It is a super-2 number, since 2×61466642731519² (a number of 28 digits) contains 22 as substring.

Together with 61466642731517, 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 (61466642731517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30733321365759 + 30733321365760.

It is an arithmetic number, because the mean of its divisors is an integer number (30733321365760).

Almost surely, 2^{61466642731519} is an apocalyptic number.

61466642731519 is a deficient number, since it is larger than the sum of its proper divisors (1).

61466642731519 is an equidigital number, since it uses as much as digits as its factorization.

61466642731519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39191040, while the sum is 61.

The spelling of 61466642731519 in words is "sixty-one trillion, four hundred sixty-six billion, six hundred forty-two million, seven hundred thirty-one thousand, five hundred nineteen".