61351988228501 has 2 divisors, whose sum is σ = 61351988228502. Its totient is φ = 61351988228500.

The previous prime is 61351988228483. The next prime is 61351988228533. The reversal of 61351988228501 is 10582288915316.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54457167840100 + 6894820388401 = 7379510^2 + 2625799^2 .

It is a cyclic number.

It is not a de Polignac number, because 61351988228501 - 2¹⁰ = 61351988227477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61351988228581) 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, 30675994114250 + 30675994114251.

It is an arithmetic number, because the mean of its divisors is an integer number (30675994114251).

Almost surely, 2^{61351988228501} is an apocalyptic number.

It is an amenable number.

61351988228501 is a deficient number, since it is larger than the sum of its proper divisors (1).

61351988228501 is an equidigital number, since it uses as much as digits as its factorization.

61351988228501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8294400, while the sum is 59.

The spelling of 61351988228501 in words is "sixty-one trillion, three hundred fifty-one billion, nine hundred eighty-eight million, two hundred twenty-eight thousand, five hundred one".