61445320 has 16 divisors (see below), whose sum is σ = 138252060. Its totient is φ = 24578112.

The previous prime is 61445303. The next prime is 61445339. The reversal of 61445320 is 2354416.

It can be written as a sum of positive squares in 2 ways, for example, as 60000516 + 1444804 = 7746^2 + 1202^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768027 + ... + 768106.

Almost surely, 2^61445320 is an apocalyptic number.

It is an amenable number.

61445320 is an abundant number, since it is smaller than the sum of its proper divisors (76806740).

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

61445320 is a wasteful number, since it uses less digits than its factorization.

61445320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536144 (or 1536140 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 61445320 is about 7838.7065259518. The cubic root of 61445320 is about 394.6053206685.

Adding to 61445320 its reverse (2354416), we get a palindrome (63799736).

The spelling of 61445320 in words is "sixty-one million, four hundred forty-five thousand, three hundred twenty".