61226893961 has 2 divisors, whose sum is σ = 61226893962. Its totient is φ = 61226893960.

The previous prime is 61226893951. The next prime is 61226893967. The reversal of 61226893961 is 16939862216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60095580736 + 1131313225 = 245144^2 + 33635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61226893961 is a prime.

It is a super-2 number, since 2×61226893961² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61226893967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30613446980 + 30613446981.

It is an arithmetic number, because the mean of its divisors is an integer number (30613446981).

Almost surely, 2^61226893961 is an apocalyptic number.

It is an amenable number.

61226893961 is a deficient number, since it is larger than the sum of its proper divisors (1).

61226893961 is an equidigital number, since it uses as much as digits as its factorization.

61226893961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 53.

The spelling of 61226893961 in words is "sixty-one billion, two hundred twenty-six million, eight hundred ninety-three thousand, nine hundred sixty-one".