61564724407 has 8 divisors (see below), whose sum is σ = 65179571760. Its totient is φ = 57987336960.

The previous prime is 61564724401. The next prime is 61564724423. The reversal of 61564724407 is 70442746516.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61564724407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61564724401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9361594 + ... + 9368167.

It is an arithmetic number, because the mean of its divisors is an integer number (8147446470).

Almost surely, 2^61564724407 is an apocalyptic number.

61564724407 is a deficient number, since it is larger than the sum of its proper divisors (3614847353).

61564724407 is a wasteful number, since it uses less digits than its factorization.

61564724407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18729953.

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 61564724407 in words is "sixty-one billion, five hundred sixty-four million, seven hundred twenty-four thousand, four hundred seven".