61568407 has 8 divisors (see below), whose sum is σ = 66952656. Its totient is φ = 56380032.

The previous prime is 61568371. The next prime is 61568443. The reversal of 61568407 is 70486516.

It is an interprime number because it is at equal distance from previous prime (61568371) and next prime (61568443).

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 61568407 - 2¹⁹ = 61044119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61568477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48313 + ... + 49570.

It is an arithmetic number, because the mean of its divisors is an integer number (8369082).

Almost surely, 2^61568407 is an apocalyptic number.

61568407 is a deficient number, since it is larger than the sum of its proper divisors (5384249).

61568407 is a wasteful number, since it uses less digits than its factorization.

61568407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97937.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 61568407 is about 7846.5538295484. The cubic root of 61568407 is about 394.8686354818.

The spelling of 61568407 in words is "sixty-one million, five hundred sixty-eight thousand, four hundred seven".