61368445 has 4 divisors (see below), whose sum is σ = 73642140. Its totient is φ = 49094752.

The previous prime is 61368443. The next prime is 61368467. The reversal of 61368445 is 54486316.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27426169 + 33942276 = 5237^2 + 5826^2 .

It is a cyclic number.

It is not a de Polignac number, because 61368445 - 2¹ = 61368443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61368443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6136840 + ... + 6136849.

It is an arithmetic number, because the mean of its divisors is an integer number (18410535).

Almost surely, 2^61368445 is an apocalyptic number.

It is an amenable number.

61368445 is a deficient number, since it is larger than the sum of its proper divisors (12273695).

61368445 is a wasteful number, since it uses less digits than its factorization.

61368445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12273694.

The product of its digits is 69120, while the sum is 37.

The square root of 61368445 is about 7833.8014399141. The cubic root of 61368445 is about 394.4406867915.

The spelling of 61368445 in words is "sixty-one million, three hundred sixty-eight thousand, four hundred forty-five".