61501341603281 has 2 divisors, whose sum is σ = 61501341603282. Its totient is φ = 61501341603280.

The previous prime is 61501341603253. The next prime is 61501341603287. The reversal of 61501341603281 is 18230614310516.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60739577473600 + 761764129681 = 7793560^2 + 872791^2 .

It is a cyclic number.

It is not a de Polignac number, because 61501341603281 - 2⁶ = 61501341603217 is a prime.

It is a super-2 number, since 2×61501341603281² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61501341603287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30750670801640 + 30750670801641.

It is an arithmetic number, because the mean of its divisors is an integer number (30750670801641).

Almost surely, 2^{61501341603281} is an apocalyptic number.

It is an amenable number.

61501341603281 is a deficient number, since it is larger than the sum of its proper divisors (1).

61501341603281 is an equidigital number, since it uses as much as digits as its factorization.

61501341603281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 41.

Adding to 61501341603281 its reverse (18230614310516), we get a palindrome (79731955913797).

The spelling of 61501341603281 in words is "sixty-one trillion, five hundred one billion, three hundred forty-one million, six hundred three thousand, two hundred eighty-one".