61056099561 has 8 divisors (see below), whose sum is σ = 83608352704. Its totient is φ = 39603956400.

The previous prime is 61056099557. The next prime is 61056099581. The reversal of 61056099561 is 16599065016.

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

It is not a de Polignac number, because 61056099561 - 2² = 61056099557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61056099561.

It is not an unprimeable number, because it can be changed into a prime (61056099541) 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, 275027365 + ... + 275027586.

It is an arithmetic number, because the mean of its divisors is an integer number (10451044088).

Almost surely, 2^61056099561 is an apocalyptic number.

It is an amenable number.

61056099561 is a deficient number, since it is larger than the sum of its proper divisors (22552253143).

61056099561 is a wasteful number, since it uses less digits than its factorization.

61056099561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550054991.

The product of its (nonzero) digits is 437400, while the sum is 48.

The spelling of 61056099561 in words is "sixty-one billion, fifty-six million, ninety-nine thousand, five hundred sixty-one".