61216031885 has 16 divisors (see below), whose sum is σ = 77604700800. Its totient is φ = 46227796416.

The previous prime is 61216031819. The next prime is 61216031897. The reversal of 61216031885 is 58813061216.

It is a cyclic number.

It is not a de Polignac number, because 61216031885 - 2¹⁰ = 61216030861 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1136825 + ... + 1189454.

It is an arithmetic number, because the mean of its divisors is an integer number (4850293800).

Almost surely, 2^61216031885 is an apocalyptic number.

It is an amenable number.

61216031885 is a deficient number, since it is larger than the sum of its proper divisors (16388668915).

61216031885 is a wasteful number, since it uses less digits than its factorization.

61216031885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326580.

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 61216031885 in words is "sixty-one billion, two hundred sixteen million, thirty-one thousand, eight hundred eighty-five".