61334645 has 4 divisors (see below), whose sum is σ = 73601580. Its totient is φ = 49067712.

The previous prime is 61334639. The next prime is 61334653. The reversal of 61334645 is 54643316.

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 39450961 + 21883684 = 6281^2 + 4678^2 .

It is a cyclic number.

It is not a de Polignac number, because 61334645 - 2¹⁰ = 61333621 is a prime.

It is a Curzon number.

It is a congruent number.

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, 6133460 + ... + 6133469.

It is an arithmetic number, because the mean of its divisors is an integer number (18400395).

Almost surely, 2^61334645 is an apocalyptic number.

It is an amenable number.

61334645 is a deficient number, since it is larger than the sum of its proper divisors (12266935).

61334645 is a wasteful number, since it uses less digits than its factorization.

61334645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12266934.

The product of its digits is 25920, while the sum is 32.

The square root of 61334645 is about 7831.6438248940. The cubic root of 61334645 is about 394.3682579093.

The spelling of 61334645 in words is "sixty-one million, three hundred thirty-four thousand, six hundred forty-five".