61620236105 has 8 divisors (see below), whose sum is σ = 75156485064. Its totient is φ = 48488054400.

The previous prime is 61620236101. The next prime is 61620236113. The reversal of 61620236105 is 50163202616.

It can be written as a sum of positive squares in 4 ways, for example, as 20967241 + 61599268864 = 4579^2 + 248192^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61620236105 - 2² = 61620236101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61620236101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101016476 + ... + 101017085.

It is an arithmetic number, because the mean of its divisors is an integer number (9394560633).

Almost surely, 2^61620236105 is an apocalyptic number.

It is an amenable number.

61620236105 is a deficient number, since it is larger than the sum of its proper divisors (13536248959).

61620236105 is a wasteful number, since it uses less digits than its factorization.

61620236105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202033627.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 61620236105 in words is "sixty-one billion, six hundred twenty million, two hundred thirty-six thousand, one hundred five".