61815960885 has 32 divisors (see below), whose sum is σ = 113054054400. Its totient is φ = 28253936448.

The previous prime is 61815960851. The next prime is 61815960893. The reversal of 61815960885 is 58806951816.

It is a happy number.

It is not a de Polignac number, because 61815960885 - 2⁷ = 61815960757 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 614664 + ... + 708126.

It is an arithmetic number, because the mean of its divisors is an integer number (3532939200).

Almost surely, 2^61815960885 is an apocalyptic number.

It is an amenable number.

61815960885 is a deficient number, since it is larger than the sum of its proper divisors (51238093515).

61815960885 is a wasteful number, since it uses less digits than its factorization.

61815960885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99777.

The product of its (nonzero) digits is 4147200, while the sum is 57.

The spelling of 61815960885 in words is "sixty-one billion, eight hundred fifteen million, nine hundred sixty thousand, eight hundred eighty-five".