61568405 has 8 divisors (see below), whose sum is σ = 73968000. Its totient is φ = 49197456.

The previous prime is 61568371. The next prime is 61568443. The reversal of 61568405 is 50486516.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61568405 - 2⁸ = 61568149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2105 + ... + 11294.

It is an arithmetic number, because the mean of its divisors is an integer number (9246000).

Almost surely, 2^61568405 is an apocalyptic number.

It is an amenable number.

61568405 is a deficient number, since it is larger than the sum of its proper divisors (12399595).

61568405 is a wasteful number, since it uses less digits than its factorization.

61568405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14323.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 61568405 is about 7846.5537021039. The cubic root of 61568405 is about 394.8686312062.

The spelling of 61568405 in words is "sixty-one million, five hundred sixty-eight thousand, four hundred five".