61009191461 has 2 divisors, whose sum is σ = 61009191462. Its totient is φ = 61009191460.

The previous prime is 61009191427. The next prime is 61009191499. The reversal of 61009191461 is 16419190016.

It is an a-pointer prime, because the next prime (61009191499) can be obtained adding 61009191461 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43433060836 + 17576130625 = 208406^2 + 132575^2 .

It is a cyclic number.

It is not a de Polignac number, because 61009191461 - 2¹⁴ = 61009175077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61009191161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30504595730 + 30504595731.

It is an arithmetic number, because the mean of its divisors is an integer number (30504595731).

Almost surely, 2^61009191461 is an apocalyptic number.

It is an amenable number.

61009191461 is a deficient number, since it is larger than the sum of its proper divisors (1).

61009191461 is an equidigital number, since it uses as much as digits as its factorization.

61009191461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 61009191461 in words is "sixty-one billion, nine million, one hundred ninety-one thousand, four hundred sixty-one".