61656515011 has 8 divisors (see below), whose sum is σ = 75884941664. Its totient is φ = 48783176640.

The previous prime is 61656514993. The next prime is 61656515159. The reversal of 61656515011 is 11051565616.

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 61656515011 - 2⁹ = 61656514499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61656525011) 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, 338771970 + ... + 338772151.

It is an arithmetic number, because the mean of its divisors is an integer number (9485617708).

Almost surely, 2^61656515011 is an apocalyptic number.

61656515011 is a deficient number, since it is larger than the sum of its proper divisors (14228426653).

61656515011 is a wasteful number, since it uses less digits than its factorization.

61656515011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677544141.

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 61656515011 in words is "sixty-one billion, six hundred fifty-six million, five hundred fifteen thousand, eleven".