61323745 has 12 divisors (see below), whose sum is σ = 85603284. Its totient is φ = 42050400.

The previous prime is 61323739. The next prime is 61323749. The reversal of 61323745 is 54732316.

It can be written as a sum of positive squares in 2 ways, for example, as 37859409 + 23464336 = 6153^2 + 4844^2 .

It is not a de Polignac number, because 61323745 - 2³ = 61323737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61323749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124906 + ... + 125395.

It is an arithmetic number, because the mean of its divisors is an integer number (7133607).

Almost surely, 2^61323745 is an apocalyptic number.

It is an amenable number.

61323745 is a deficient number, since it is larger than the sum of its proper divisors (24279539).

61323745 is a wasteful number, since it uses less digits than its factorization.

61323745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250320 (or 250313 counting only the distinct ones).

The product of its digits is 15120, while the sum is 31.

The square root of 61323745 is about 7830.9478992010. The cubic root of 61323745 is about 394.3448949923.

The spelling of 61323745 in words is "sixty-one million, three hundred twenty-three thousand, seven hundred forty-five".