61961161219 has 2 divisors, whose sum is σ = 61961161220. Its totient is φ = 61961161218.

The previous prime is 61961161187. The next prime is 61961161237. The reversal of 61961161219 is 91216116916.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61961161219 - 2⁵ = 61961161187 is a prime.

It is a super-2 number, since 2×61961161219² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61961161819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30980580609 + 30980580610.

It is an arithmetic number, because the mean of its divisors is an integer number (30980580610).

Almost surely, 2^61961161219 is an apocalyptic number.

61961161219 is a deficient number, since it is larger than the sum of its proper divisors (1).

61961161219 is an equidigital number, since it uses as much as digits as its factorization.

61961161219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 43.

It can be divided in two parts, 6 and 1961161219, that added together give a square (1961161225 = 44285²).

The spelling of 61961161219 in words is "sixty-one billion, nine hundred sixty-one million, one hundred sixty-one thousand, two hundred nineteen".