61450320 has 80 divisors (see below), whose sum is σ = 194130432. Its totient is φ = 16074240.

The previous prime is 61450307. The next prime is 61450321. The reversal of 61450320 is 2305416.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×61450320² = 7552283656204800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61450321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10305 + ... + 15135.

Almost surely, 2^61450320 is an apocalyptic number.

61450320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61450320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97065216).

61450320 is an abundant number, since it is smaller than the sum of its proper divisors (132680112).

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

61450320 is a wasteful number, since it uses less digits than its factorization.

61450320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4900 (or 4894 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 61450320 is about 7839.0254496334. The cubic root of 61450320 is about 394.6160238058.

Adding to 61450320 its reverse (2305416), we get a palindrome (63755736).

The spelling of 61450320 in words is "sixty-one million, four hundred fifty thousand, three hundred twenty".