61516226556943 has 2 divisors, whose sum is σ = 61516226556944. Its totient is φ = 61516226556942.

The previous prime is 61516226556913. The next prime is 61516226556949. The reversal of 61516226556943 is 34965562261516.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61516226556943 is a prime.

It is a super-2 number, since 2×61516226556943² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61516226556949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30758113278471 + 30758113278472.

It is an arithmetic number, because the mean of its divisors is an integer number (30758113278472).

Almost surely, 2^{61516226556943} is an apocalyptic number.

61516226556943 is a deficient number, since it is larger than the sum of its proper divisors (1).

61516226556943 is an equidigital number, since it uses as much as digits as its factorization.

61516226556943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984000, while the sum is 61.

The spelling of 61516226556943 in words is "sixty-one trillion, five hundred sixteen billion, two hundred twenty-six million, five hundred fifty-six thousand, nine hundred forty-three".