61644212 has 24 divisors (see below), whose sum is σ = 124385856. Its totient is φ = 26183808.

The previous prime is 61644211. The next prime is 61644217. The reversal of 61644212 is 21244616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61644211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6578 + ... + 12905.

It is an arithmetic number, because the mean of its divisors is an integer number (5182744).

Almost surely, 2^61644212 is an apocalyptic number.

It is an amenable number.

61644212 is an abundant number, since it is smaller than the sum of its proper divisors (62741644).

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

61644212 is a wasteful number, since it uses less digits than its factorization.

61644212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19607 (or 19605 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 61644212 is about 7851.3828081428. The cubic root of 61644212 is about 395.0306273319.

Adding to 61644212 its reverse (21244616), we get a palindrome (82888828).

The spelling of 61644212 in words is "sixty-one million, six hundred forty-four thousand, two hundred twelve".