61644355362 has 12 divisors (see below), whose sum is σ = 133562769990. Its totient is φ = 20548118448.

The previous prime is 61644355351. The next prime is 61644355379. The reversal of 61644355362 is 26355344616.

61644355362 is a `hidden beast` number, since 6 + 164 + 435 + 53 + 6 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 60836715801 + 807639561 = 246651^2 + 28419^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1712343187 + ... + 1712343222.

Almost surely, 2^61644355362 is an apocalyptic number.

61644355362 is an abundant number, since it is smaller than the sum of its proper divisors (71918414628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61644355362 is a wasteful number, since it uses less digits than its factorization.

61644355362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424686417 (or 3424686414 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 45.

Adding to 61644355362 its reverse (26355344616), we get a palindrome (87999699978).

The spelling of 61644355362 in words is "sixty-one billion, six hundred forty-four million, three hundred fifty-five thousand, three hundred sixty-two".