61644352 has 84 divisors (see below), whose sum is σ = 155319984. Its totient is φ = 24003840.

The previous prime is 61644313. The next prime is 61644371. The reversal of 61644352 is 25344616.

It is a super-2 number, since 2×61644352² = 7600052266999808, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33603 + ... + 35389.

Almost surely, 2^61644352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61644352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77659992).

61644352 is an abundant number, since it is smaller than the sum of its proper divisors (93675632).

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

61644352 is a wasteful number, since it uses less digits than its factorization.

61644352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824 (or 1807 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 61644352 is about 7851.3917237646. The cubic root of 61644352 is about 395.0309263827.

Adding to 61644352 its reverse (25344616), we get a palindrome (86988968).

The spelling of 61644352 in words is "sixty-one million, six hundred forty-four thousand, three hundred fifty-two".