61056509811 has 8 divisors (see below), whose sum is σ = 88809468864. Its totient is φ = 37003945320.

The previous prime is 61056509771. The next prime is 61056509821. The reversal of 61056509811 is 11890565016.

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

It is not a de Polignac number, because 61056509811 - 2¹¹ = 61056507763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61056509821) 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, 925098601 + ... + 925098666.

It is an arithmetic number, because the mean of its divisors is an integer number (11101183608).

Almost surely, 2^61056509811 is an apocalyptic number.

61056509811 is a deficient number, since it is larger than the sum of its proper divisors (27752959053).

61056509811 is a wasteful number, since it uses less digits than its factorization.

61056509811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850197281.

The product of its (nonzero) digits is 64800, while the sum is 42.

The spelling of 61056509811 in words is "sixty-one billion, fifty-six million, five hundred nine thousand, eight hundred eleven".