61117228429 has 2 divisors, whose sum is σ = 61117228430. Its totient is φ = 61117228428.

The previous prime is 61117228391. The next prime is 61117228439. The reversal of 61117228429 is 92482271116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43844172100 + 17273056329 = 209390^2 + 131427^2 .

It is a cyclic number.

It is not a de Polignac number, because 61117228429 - 2¹⁵ = 61117195661 is a prime.

It is a super-2 number, since 2×61117228429² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61117228439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30558614214 + 30558614215.

It is an arithmetic number, because the mean of its divisors is an integer number (30558614215).

Almost surely, 2^61117228429 is an apocalyptic number.

It is an amenable number.

61117228429 is a deficient number, since it is larger than the sum of its proper divisors (1).

61117228429 is an equidigital number, since it uses as much as digits as its factorization.

61117228429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 43.

The spelling of 61117228429 in words is "sixty-one billion, one hundred seventeen million, two hundred twenty-eight thousand, four hundred twenty-nine".