61838243629 has 2 divisors, whose sum is σ = 61838243630. Its totient is φ = 61838243628.

The previous prime is 61838243609. The next prime is 61838243653. The reversal of 61838243629 is 92634283816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60747460900 + 1090782729 = 246470^2 + 33027^2 .

It is a cyclic number.

It is not a de Polignac number, because 61838243629 - 2²⁵ = 61804689197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61838243609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30919121814 + 30919121815.

It is an arithmetic number, because the mean of its divisors is an integer number (30919121815).

Almost surely, 2^61838243629 is an apocalyptic number.

It is an amenable number.

61838243629 is a deficient number, since it is larger than the sum of its proper divisors (1).

61838243629 is an equidigital number, since it uses as much as digits as its factorization.

61838243629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2985984, while the sum is 52.

The spelling of 61838243629 in words is "sixty-one billion, eight hundred thirty-eight million, two hundred forty-three thousand, six hundred twenty-nine".